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Takuro Kobashi

Section

Graduate School of Environmental Studies

Job title

Associate Professor

Degree

Ｐｈ．Ｄ．（カリフォルニア大学）
Ｍ．Ｓ．（テキサスＡ＆Ｍ大学）

researchmap

https://researchmap.jp/kobashiworld

J-GLOBAL ID

201301006560140389

Profile

都市のエネルギーシステムを、再生可能エネルギーを基盤とした分散型エネルギーシステムに移行するための研究を行っています。

Research History 9

2022/04 - Present

Tohoku University　Graduate School of Environmental Studies　Associate Professor
2020/09 - 2022/03

Global Carbon Project, International Tsukuba Office　Acting Director
2019/04 - 2022/03

National Institute for Environmental Studies　Research Associate
2019/04 - 2020/03

Research Institute for Humanity and Nature　Visiting Associate Professor
2016/11 - 2019/03

Renewable Energy Institute　Senior Researcher
2014/05 - 2016/04

University of Bern　Climate and Environmental Physics　Lecturer/Marie Curie Fellow
2010/05 - 2014/04

National Institute of Polar Research　Project researcher/assistant professor
2007/10 - 2010/03

Institute for Global Environmental Strategies　Climate Policy　Researcher
2006/07 - 2006/09

World Bank　Environment and Social Development Unit of the East Asia and Pacific Region　Short term consultant

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Education 3

University of California, San Diego　Scripps Institution of Oceanography(Ph.D.)

2001/09 - 2007/05
Texas A&M University　Department of Geology&Geophysics (M.Sc.)

1998/09 - 2001/05
Hokkaido University　Department of Engineering(B.Eng.)

1994/04 - 1998/03

Committee Memberships 1

京都未来門プロジェクト実行委員会　京都未来門プロジェクト実行委員・代表

2021/05 - Present

Professional Memberships 2

The Society for Environmental Economics and Policy Studies (SEEPS)

2020/07 - Present
JAPAN SOCIETY OF ENERGY AND RESOURCES

2018/10 - Present

Research Interests 11

EV
風力発電
再エネポテンシャル
techno-economic analysis
solar power
再生エネルギー
グリーンランド
温暖化
氷床コア
完新世
気候変動

Research Areas 5

Social infrastructure (civil Engineering, architecture, disaster prevention) / Architectural and city planning / Urban decarbonization
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Machine elements and tribology / EV
Environmental science/Agricultural science / Environmental materials/recycling technology / Renewable Energy
Environmental science/Agricultural science / Recycling systems and society / Renewable Energy
Environmental science/Agricultural science / Environmental dynamics /

Awards 3

研究奨励賞

2022/12　石田實記念財団
Marie Curie Fellow

2014/04　EU Commission　Investigation of Greenland temperature variability over the 6000 years using trapped air in ice cores
Distinguished Graduate Student Award

2002/05　Texas A&M University

Papers 47

Enabling maximum decarbonization from districts in Kyoto through rooftop PVs by integrating with EVs as battery Peer-reviewed

Takuro Kobashi, Junbin Xiao, Tuo Zhang

Sustainable Cities and Society　131　106717-106717　2025/09
Publisher: Elsevier BV
DOI： 10.1016/j.scs.2025.106717 　

ISSN： 2210-6707
On the decarbonization potentials of rooftop PVs integrated with EVs as battery for all the municipalities of Japan Peer-reviewed

Nguyen Thi Quynh Trang, Koharu Okada, Yusei Sugiyama, Takahiro Yoshida, Yujiro Hirano, Peraphan Jittrapirom, Tosiyuki Nakaegawa, Takuro Kobashi

Applied Energy　393　126067-126067　2025/09
Publisher: Elsevier BV
DOI： 10.1016/j.apenergy.2025.126067 　

ISSN： 0306-2619
Facilitating a carbon neutral transition in Kyoto:Initiatives on rooftop photovoltaics integrated with electric vehicles Peer-reviewed

Takuro Kobashi, Eric Zusman, Makoto Taniguchi, Masaru Yarime

Technology in Society　80　102774　2025/03
Publisher: Elsevier BV
DOI： 10.1016/j.techsoc.2024.102774 　

ISSN： 0160-791X
Asymmetric Nash bargaining model for operation optimization of multi-integrated energy systems considering peer-to-peer energy trading Peer-reviewed

Meng Yang, Yisheng Liu, Takuro Kobashi

Sustainable Cities and Society　114　105791-105791　2024/11
Publisher: Elsevier BV
DOI： 10.1016/j.scs.2024.105791 　

ISSN： 2210-6707
Assessing urban rooftop PV economics for regional deployment by integrating local socioeconomic, technological, and policy conditions Peer-reviewed

Liya Xue, Junling Liu, Xiaojing Lin, Mengyue Li, Takuro Kobashi

Applied Energy　353　122058-122058　2024/01
Publisher: Elsevier BV
DOI： 10.1016/j.apenergy.2023.122058 　

ISSN： 0306-2619
SolarEV City Concept for Paris Invited Peer-reviewed

Paul Deroubaix, Takuro Kobashi, Léna Gurriaran, Fouzi Benkhelifa, Philippe Ciais, Katsumasa Tanaka

Applied Energy　350　121762-121762　2023/11
Publisher: Elsevier BV
DOI： 10.1016/j.apenergy.2023.121762 　

ISSN： 0306-2619
Policy Design by “Imaginary Future Generations” with Systems Thinking a Practice by Kyoto City towards Decarbonization in 2050 Peer-reviewed

Keishiro Hara, Yutaka Nomaguchi, Shinya Fukutomi, Kuroda Masashi, Kikuo Fujita, Yoko Kawai, Masayuki Fujita, Takuro Kobashi

Futures　103272-103272　2023/10
Publisher: Elsevier BV
DOI： 10.1016/j.futures.2023.103272 　

ISSN： 0016-3287
On the Adoption of Rooftop Photovoltaics Integrated with Electric Vehicles toward Sustainable Bangkok City, Thailand Peer-reviewed

Thiti Jittayasotorn, Muthiah Sadidah, Takahiro Yoshida, Takuro Kobashi

Energies　16　(7)　3011-3011　2023/03
Publisher: MDPI AG
DOI： 10.3390/en16073011 　

eISSN： 1996-1073

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Realizing urban energy systems with net-zero CO2 emissions by 2050 is a major goal of global societies in building sustainable and livable cities. Developing cities hold a key to meeting this goal, as they will expand rapidly in the next decades with increasing energy demand, potentially associated with rising CO2 emissions and air pollution if fossil fuels continue to be utilized. Therefore, identifying equitable, cost-effective, and deep decarbonization pathways for developing cities is essential. Here, we analyzed Bangkok City, Thailand, using the System Advisor Model (SAM) for techno-economic analysis to evaluate the decarbonization potential of rooftop photovoltaics (PV) integrated with electric vehicles (EVs) as batteries on a city scale. The analyses took into consideration hourly local weather conditions, electricity demand, electricity tariffs, feed-in-tariffs, degradation, declining costs of PV and EV, etc., specific to Bangkok. As the prices of PV and EVs decrease over the next several decades, the “PV + EV” system may provide a basis for new urban power infrastructure with high energy efficiency, low energy cost, and large CO2 emission reduction. The results show that the “PV + EV” scenario in 2030 has the highest CO2 emission reduction of 73% from electricity and vehicle usage, supplying 71% of the electricity demand of the city. The “PV + EV” system may reduce energy costs by 59% with estimated technology costs in 2030. Most of the energy generated from rooftop PV is consumed owing to large EV battery capacities, which can contribute to the rapid decarbonization of Bangkok City by 2050.
Equitable, affordable, and deep decarbonization pathways for low-latitude developing cities by rooftop photovoltaics integrated with electric vehicles Peer-reviewed

Retno Gumilang Dewi, Ucok Welo Risma Siagian, Briantama Asmara, Syahrina Dyah Anggraini, Jun Ichihara, Takuro Kobashi

Applied Energy　332　120507-120507　2023/02
Publisher: Elsevier BV
DOI： 10.1016/j.apenergy.2022.120507 　

ISSN： 0306-2619
Comment on “comparison of holocene temperature reconstructions based on GISP2 multiple-gas-isotope measurements” by

Takuro Kobashi, Tosiyuki Nakaegawa

Quaternary Science Reviews　298　107707-107707　2022/12
Publisher: Elsevier BV
DOI： 10.1016/j.quascirev.2022.107707 　

ISSN： 0277-3791
A framework to evaluate the energy-environment-economic impacts of developing rooftop photovoltaics integrated with electric vehicles at city level Peer-reviewed

Junling Liu, Mengyue Li, Liya Xue, Takuro Kobashi

Renewable Energy　200　647-657　2022/10
Publisher: Elsevier BV
DOI： 10.1016/j.renene.2022.10.011 　

ISSN： 0960-1481
Energy infrastructure transitions with PV and EV combined systems using techno-economic analyses for decarbonization in cities Peer-reviewed

Soowon Chang, Jun-young Cho, Jae Heo, Junsuk Kang, Takuro Kobashi

Applied Energy　319　119254　2022/08

DOI： 10.3390/en15030883 　
Techno-economic analysis of rooftop PV plus EV system toward carbon neutrality in Shenzhen city Peer-reviewed

Proceedings of 13h International Conference on Applied Energy (accepted)　2022/04
Potentials of rooftop photovoltaics combined with electric vehicles for decarbonization in Korean cities Peer-reviewed

Chang S, J Cho, J Kang, T Kobashi

Proceedings of 13h International Conference on Applied Energy (accepted)　2022/04
Potentials of rooftop photovoltaics plus electric vehicles for deep decarbonization of Jakarta City, Indonesia Peer-reviewed

Proceedings of 13h International Conference on Applied Energy (accepted)　2022/04
Assessment of waterfront office redevelopment plan on optimal building arrangements with rooftop photovoltaics: A case study for Shinagawa, Tokyo

Younghun Choi, Takuro Kobashi, Yoshiki Yamagata, Akito Murayama

energies　15　(3)　1-15　2022/01
Publisher: MDPI AG
DOI： 10.3390/en15030883 　

eISSN： 1996-1073

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Designing waterfront redevelopment generally focuses on attractiveness, leisure, and beauty, resulting in various types of building and block shapes with limited considerations on environmental aspects. However, increasing climate change impacts necessitate these buildings to be sustainable, resilient, and zero CO2 emissions. By producing five scenarios (plus existing buildings) with constant floor areas, we investigated how buildings and district forms with building integrated photovoltaics (BIPV) affect energy consumption and production, self-sufficiency, CO2 emission, and energy costs in the context of waterfront redevelopment in Tokyo. From estimated hourly electricity demands of the buildings, techno-economic analyses were conducted for rooftop PV systems for 2018 and 2030 with declining costs of rooftop PV systems. We found that environmental building designs with rooftop PV system are increasingly economical in Tokyo with CO2 emission reduction of 2–9% that depends on rooftop sizes. Payback periods drop from 14 years in 2018 to 6 years in 2030. Toward net-zero CO2 emissions by 2050, immediate actions are necessary to install rooftop PVs on existing and new buildings with energy efficiency improvements by construction industry and building owners. To facilitate such actions, national and local governments need to adopt appropriate policies.
Rapid rise of decarbonization potentials of photovoltaics plus electric vehicles in residential houses over commercial districts

Takuro Kobashi, Younghun Choi, Yujiro Hirano, Yoshiki Yamagata, Kelvin Say

Applied Energy　306　118142-118142　2022/01
Publisher: Elsevier BV
DOI： 10.1016/j.apenergy.2021.118142 　

ISSN： 0306-2619
Waterfront redevelopment methodology for optimal energy demand and solar energy production: Shinagawa river side in Tokyo Peer-reviewed

Younghun Choi, Takuro Kobashi, Yoshiki Yamagata

International Conference on Applied Energy 2020　10　1-5　2021/04
Techno-economic assessment on PV systems integrated with batteries and electric vehicles in residential area and urban district in Japan International-journal Peer-reviewed

Takuro Kobashi, Choi Younhun, Yujiro Hirano, Yoshiki Yamagata

9　1-5　2021/04
Publisher: Energy Proceedings
SolarEV City concept: Building the next urban power and mobility systems Peer-reviewed

Takuro Kobashi, Peraphan Jittrapirom, Takahiro Yoshida, Yujiro Hirano, Yoshiki Yamagata

Environmental Research Letters　16　(2)　024042-024042　2021/02/09
Publisher: IOP Publishing
DOI： 10.1088/1748-9326/abd430 　

eISSN： 1748-9326
Characteristics of Extreme Value Statistics of Annual Maximum Monthly Precipitation in East Asia Calculated Using an Earth System Model of Intermediate Complexity Peer-reviewed

Tosiyuki Nakaegawa, Takuro Kobashi, Hirotaka Kamahori

Atmosphere　11　(12)　1273-1273　2020/11/25
Publisher: MDPI AG
DOI： 10.3390/atmos11121273 　

eISSN： 2073-4433

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Extreme precipitation is no longer stationary under a changing climate due to the increase in greenhouse gas emissions. Nonstationarity must be considered when realistically estimating the amount of extreme precipitation for future prevention and mitigation. Extreme precipitation with a certain return level is usually estimated using extreme value analysis under a stationary climate assumption without evidence. In this study, the characteristics of extreme value statistics of annual maximum monthly precipitation in East Asia were evaluated using a nonstationary historical climate simulation with an Earth system model of intermediate complexity, capable of long-term integration over 12,000 years (i.e., the Holocene). The climatological means of the annual maximum monthly precipitation for each 100-year interval had nonstationary time series, and the ratios of the largest annual maximum monthly precipitation to the climatological mean had nonstationary time series with large spike variations. The extreme value analysis revealed that the annual maximum monthly precipitation with a return level of 100 years estimated for each 100-year interval also presented a nonstationary time series which was normally distributed and not autocorrelated, even with the preceding and following 100-year interval (lag 1). Wavelet analysis of this time series showed that significant periodicity was only detected in confined areas of the time–frequency space.
On the potential of “Photovoltaics + Electric vehicles” for deep decarbonization of Kyoto’s power systems: Techno-economic-social considerations Peer-reviewed

Kobashi, Takuro, Takahiro Yoshida, Yoshiki Yamagata, Katsuhiko Naito, Stefan Pfenninger, Kelvin Say, Yasuhiro Takeda, Amanda Ahl, Masaru Yarime, Keishiro Hara

Applied Energy　275　115419-115419　2020/10
Publisher: Elsevier BV
DOI： 10.1016/j.apenergy.2020.115419 　

ISSN： 0306-2619
Techno-economic assessment of photovoltaics plus electric vehicles towards household-sector decarbonization in Kyoto and Shenzhen by the year 2030 Peer-reviewed

Takuro Kobashi, Kelvin Say, Jiayang Wang, Masaru Yarime, Dong Wang, Takahiro Yoshida, Yoshiki Yamagata

Journal of Cleaner Production　253　1-17　2020/04

DOI： 10.1016/j.jclepro.2019.119933 　

ISSN： 0959-6526

eISSN： 1879-1786
Cost-optimal pathways to decarbonize urban energy systems with PV, batteries, and electric vehicles: A case study for Kyoto Peer-reviewed

Kobashi, T. T. Yoshida, K. Naito, S. Pfenninger, Y. Yamagata

Proceedings of 11th International Conference on Applied Energy, Part 2, Sweden, 2019　2020/04
Urban systems and the role of big data

Yamagata, Y., P. P.J. Yang, S. Chang, M. B. Tobey, R. B. Binder, P. J. Fourie, P. Jittrapirom, T. Kobashi, T. Yoshida and J. Aleksejeva

Urban Systems Design　23-58　2020/02
Smart city and ICT infrastructure with vehicle to X applications toward urban decarbonization

Kobashi, T., Y. Yamagata, T. Yoshida, S. Chang, Y. Mochizuki, A. Ahl and J. Alekseje

Urban Systems Design　289-333　2020/02
Techno-economic assessment of the residential photovoltaic systems integrated with electric vehicles: A case study of Japanese households towards 2030 Peer-reviewed

Takuro Kobashi, Masaru Yarime

Energy Procedia　158　3802-3807　2019/02
Techno-economic analyses of PV, PV + battery, PV + EV for household in Kyoto and Shenzhen towards 2030

Kobashi, T, K. Say, J. Wang, M. Yarime

35th Japan Society of Energy and Resources　383-386　2019/01
EV普及の動向と展望：気候変動対策の観点から

小端拓郎

自然エネルギー財団報告書　1-38　2018/06
Erratum: Author Correction: Volcanic influence on centennial to millennial Holocene Greenland temperature change (Scientific reports (2017) 7 1 (1441))

Takuro Kobashi, Laurie Menviel, Aurich Jeltsch-Thömmes, Bo M. Vinther, Jason E. Box, Raimund Muscheler, Toshiyuki Nakaegawa, Patrik L. Pfister, Michael Döring, Markus Leuenberger, Heinz Wanner, Atsumu Ohmura

Scientific reports　8　(1)　4292　2018/03/06
Publisher: NLM (Medline)
DOI： 10.1038/s41598-018-21307-y 　

ISSN： 2045-2322
Volcanic influence on centennial to millennial Holocene Greenland temperature change Peer-reviewed

Takuro Kobashi, Laurie Menviel, Aurich Jeltsch-Thommes, Bo M. Vinther, Jason E. Box, Raimund Muscheler, Toshiyuki Nakaegawa, Patrik L. Pfister, Michael Doring, Markus Leuenberger, Heinz Wanner, Atsumu Ohmura

SCIENTIFIC REPORTS　7　2017/05

DOI： 10.1038/s41598-017-01451-7 　

ISSN： 2045-2322
Modern solar maximum forced late twentieth century Greenland cooling Peer-reviewed

T. Kobashi, J. E. Box, B. M. Vinther, K. Goto-Azuma, T. Blunier, J. W. C. White, T. Nakaegawa, C. S. Andresen

GEOPHYSICAL RESEARCH LETTERS　42　(14)　5992-5999　2015/07

DOI： 10.1002/2015GL064764 　

ISSN： 0094-8276

eISSN： 1944-8007
Post-bubble close-off fractionation of gases in polar firn and ice cores: effects of accumulation rate on permeation through overloading pressure Peer-reviewed

T. Kobashi, T. Ikeda-Fukazawa, M. Suwa, J. Schwander, T. Kameda, J. Lundin, A. Hori, H. Motoyama, M. Doering, M. Leuenberger

ATMOSPHERIC CHEMISTRY AND PHYSICS　15　(24)　13895-13914　2015

DOI： 10.5194/acp-15-13895-2015 　

ISSN： 1680-7316

eISSN： 1680-7324
Causes of Greenland temperature variability over the past 4000 yr: implications for northern hemispheric temperature changes Peer-reviewed

T. Kobashi, K. Goto-Azuma, J. E. Box, C-C Gao, T. Nakaegawa

CLIMATE OF THE PAST　9　(5)　2299-2317　2013

DOI： 10.5194/cp-9-2299-2013 　

ISSN： 1814-9324

eISSN： 1814-9332
On the origin of multidecadal to centennial Greenland temperature anomalies over the past 800 yr Peer-reviewed

T. Kobashi, D. T. Shindell, K. Kodera, J. E. Box, T. Nakaegawa, K. Kawamura

CLIMATE OF THE PAST　9　(2)　583-596　2013

DOI： 10.5194/cp-9-583-2013 　

ISSN： 1814-9324

eISSN： 1814-9332
High variability of Greenland surface temperature over the past 4000 years estimated from trapped air in an ice core Peer-reviewed

Takuro Kobashi, Kenji Kawamura, Jeffrey P. Severinghaus, Jean-Marc Barnola, Toshiyuki Nakaegawa, Bo M. Vinther, Sigfus J. Johnsen, Jason E. Box

GEOPHYSICAL RESEARCH LETTERS　38　2011/11

DOI： 10.1029/2011GL049444 　

ISSN： 0094-8276
Solar induced Greenland temprature variability over the past 4000 years

Kobashi Takuro, Kawamura Kenji, Severinghaus Jeff, Bernola Jean-Marc, Nakaegawa Toshiyuki, Vinther Bo, Johnsen Sigfus

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research　2011　125-125　2011
Publisher: The Japanese Society of Snow and Ice / Japan Society for Snow Engineering
DOI： 10.14851/jcsir.2011.0.125.0 　

ISSN： 1883-0870
Persistent multi-decadal Greenland temperature fluctuation through the last millennium Peer-reviewed

Takuro Kobashi, Jeffrey P. Severinghaus, Jean-Marc Barnola, Kenji Kawamura, Tara Carter, Tosiyuki Nakaegawa

CLIMATIC CHANGE　100　(3-4)　733-756　2010/06

DOI： 10.1007/s10584-009-9689-9 　

ISSN： 0165-0009

eISSN： 1573-1480
Abrupt Climate Changes During the Last 11,600 Years

KOBASHI Takuro

JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES　23　(1)　75-82　2010/01/05
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/jjshwr.23.75 　

ISSN： 0915-1389

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Greenland ice cores provide us with insights that climate during the last 11,600 years, the Holocene, was relatively stable as it is compared with those in glacial periods. During this period, human societies changed from hunter-gatherer societies to agricultural ones, causing rapid cultural developments toward present. However, even in this relatively stable period a few abrupt climate changes have been known. In this paper, by closely looking at abrupt climate changes 8,200 years ago and 11,270 years ago, we will examine a range of natural climate variability that can not be inferred from short observational records.
Last 11600 years (Holocene) of Greenland temperature variation

Takuro Kobashi, Kenji Kawamura, Jeff Sesveringhaus, Toshiyuki Nakaegawa

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research　2010　100　2010

DOI： 10.14851/jcsir.2010.0.100.0 　

ISSN： 1883-0889 1883-0870
North Greenland Eemian Ice Driling

Kumiko Goto-Azuma, Jun Uetake, Kenji Kawamura, Hiroshi Kanda, Takayuki Kuramoto, Takuro Kobashi, Takahiro Segawa, Chiikako Takamura, Motohiro Hirabayashi, Yoshiyuki Fujii, Shuji Fujita, Takayuki Miyake, Hideaki Motoyama, Shuji Aoki, Takakiyo Nakazawa, Nobuhiko Azuma, Motoyuki Sato, Yoshinori Iizuka, Atsushi Miyamoto, Kimikazu Sasa, Akira Hori, Kazuho Horiuchi

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research　2010　4　2010

DOI： 10.14851/jcsir.2010.0.4.0 　

ISSN： 1883-0889 1883-0870

eISSN： 1883-0889
Argon and nitrogen isotopes of trapped air in the GISP2 ice core during the Holocene epoch (0-11,500 B.P.): Methodology and implications for gas loss processes Peer-reviewed

Takuro Kobashi, Jeffrey P. Severinghaus, Kenji Kawamura

GEOCHIMICA ET COSMOCHIMICA ACTA　72　(19)　4675-4686　2008/10

DOI： 10.1016/j.gca.2008.07.006 　

ISSN： 0016-7037
4 +/- 1.5 degrees C abrupt warming 11,270 yr ago identified from trapped air in Greenland ice Peer-reviewed

Takuro Kobashi, Jefftey P. Severinghaus, Jean-Marc Barnola

EARTH AND PLANETARY SCIENCE LETTERS　268　(3-4)　397-407　2008/04

DOI： 10.1016/j.epsl.2008.01.032 　

ISSN： 0012-821X

eISSN： 1385-013X
Precise timing and characterization of abrupt climate change 8200 years ago from air trapped in polar ice Peer-reviewed

Takuro Kobashi, Jeffrey P. Severinghaus, Edward J. Brook, Jean-Marc Barnola, Alexi M. Grachev

QUATERNARY SCIENCE REVIEWS　26　(9-10)　1212-1222　2007/05

DOI： 10.1016/j.quascirev.2007.01.009 　

ISSN： 0277-3791
Water mass stability reconstructions from greenhouse (Eocene) to icehouse (Oligocene) for the northern Gulf Coast continental shelf (USA) Peer-reviewed

T Kobashi, EL Grossman, DT Dockery, LC Ivany

PALEOCEANOGRAPHY　19　(1)　2004/03

DOI： 10.1029/2003PA000934 　

ISSN： 0883-8305

eISSN： 1944-9186
The oxygen isotopic record of seasonality in Conus shells and its application to understanding late middle Eocene (38 Ma) climate Peer-reviewed

Takuro Kobashi, Ethan L. Grossman

Paleontological Research　7　(4)　343-355　2003/12/31
Publisher: The Palaeontological Society of Japan (PSJ)
DOI： 10.2517/prpsj.7.343 　

ISSN： 1342-8144
Reevaluation of conflicting Eocene tropical temperature estimates: Molluskan oxygen isotope evidence for warm low latitudes Peer-reviewed

Takuro Kobashi, Ethan L. Grossman, Thomas E. Yancey, David T. Dockery

Geology　29　983-986　2001/01/01

DOI： 10.1130/0091-7613(2001)029<0983:ROCETT>2.0.CO;2 　

ISSN： 0091-7613

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Misc. 14

Scenario evaluation of local energy management in Shinchi Town, Fukushima Prefecture

平野勇二郎, 五味馨, 小端拓郎, 吉田友紀子

空気調和・衛生工学会東北支部学術・技術報告会論文集(CD-ROM)　13th　2024
Future Scenarios and Assessment of Gradual Diffusion of Renewable Energy Technologies towards 2050: Case Study of a Japanese Municipality

Yutaka Iwasaki, Takuro Kobashi, Yukari Fuchigami, Keishiro Hara

2023/12

DOI： 10.2139/ssrn.4674824 　
低緯度地帯都市の太陽光発電とEVを活用した都市の脱炭素化 Invited

小端拓郎

グリーンエネルギー　32　(8)　28-32　2023/08
SolarEVシティー構想推進への期待と課題 Invited

小端拓郎

自動車技術　77　(6)　98-103　2023/06
SolarEV シティー構想の可能性-都市のカーボンニュートラル実現に向けた戦略 Invited

小端拓郎

ベース設計資料　191　2022/09
Publisher: 建築工業調査会
Cost optimal decarbonization pathways using PV, battery, EV for Japanese cities: A case study for Kyoto City Invited Peer-reviewed

Takuro Kobashi, Takahiro Yoshida, Yoshiki Yamagata

Smart Grid　2020/10
Glaciological Data Collected by the 48th–54th Japanese Antarctic Research Expeditions during 2007–2013

Hideaki MOTOYAMA, Teruo FURUKAWA, Shuji FUJITA, Kunio SHINBORI, Yoichi TANAKA, Yuansheng LI, Ji-woong CHUNG, Fumio NAKAZAWA, Kotaro FUKUI, Hiroyuki ENOMOTO, Shin SUGIYAMA, Hitoshi ASANO, Yasuo TAKEDA, Motohiro HIRABAYASHI, Daisuke NISHIMURA, Takuya MASUNAGA, Takayuki KURAMOTO, Takuro KOBASHI, Ryo KUSAKA, Takeshi KINASE, Chusaku IKEDA, Toshitaka SUZUKI, Hiroshi OHNO, Yu HOSHINA, Yukiko HAYAKAWA, Takao KAMEDA

JARE data reports. Glaciology = JARE data reports. Glaciology　35　1-44　2015/11
P134 タンクモデルで算定された貯水量の年平均値の長期変動(ポスターセッション)

仲江川敏之, 荒川理, 小端拓郎

大会講演予講集　105　100-100　2014
Publisher: 日本気象学会
南極ドームふじコアの化学成分が示す過去70万年の環境変動

東久美子, 平林幹啓, 本山秀明, 三宅隆之, 倉元隆之, 植村立, 川村賢二, PARRENIN Frederic, 鈴木香寿恵, 飯塚芳徳, 鈴木啓助, 五十嵐誠, 藤井理行, 鈴木利孝, 堀川信一郎, 河野美香, 藤田耕史, 櫻井俊光, 小端拓郎

極域科学シンポジウム講演予稿集(CD-ROM)　4th　ROMBUNNO.IC,GOTOAZUMAKUMIKO,1,V3　2013
Late Holocene climate change: A perspective from Greenland temperature over the past 4000 years

Kobashi Takuro, Kawamura Kenji, Goto-Azuma Kumiko

Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research　2012　90-90　2012
Publisher: The Japanese Society of Snow and Ice / Japan Society for Snow Engineering
DOI： 10.14851/jcsir.2012.0_90 　

ISSN： 1883-0870
グリーンランドNEEMにおける観測報告

東久美子, 青木周司, 東信彦, 飯塚芳徳, 植竹淳, 川村賢二, 神田啓史, 倉元隆之, 小端拓郎, 笹公和, 佐藤基之, 瀬川高弘, 高村近子, 中澤高清, 平林幹啓, 藤井理行, 藤田秀二, 堀彰, 堀内一穂, 三宅隆之, 三宅隆之, 宮本淳, 本山秀明

極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM)　2011　2011
グリーンランド深層氷床コア掘削計画(NEEM計画)

東久美子, 青木周司, 東信彦, 飯塚芳徳, 植竹淳, 川村賢二, 神田啓史, 倉元隆之, 小端拓郎, 笹公和, 佐藤基之, 瀬川高弘, 高村近子, 中澤高清, 平林幹啓, 藤井理行, 藤田秀二, 堀彰, 堀内一穂, 三宅隆之, 宮本淳, 本山秀明

雪氷研究大会講演要旨集　2010　2010

ISSN： 1883-0870
グリーンランド深層氷床コア掘削計画(NEEM計画)の展望

東久美子, 青木周司, 東信彦, 飯塚芳徳, 植竹淳, 川村賢二, 神田啓史, 倉元隆之, 小端拓郎, 笹公和, 佐藤基之, 瀬川高弘, 高村近子, 中澤高清, 平林幹啓, 藤井理行, 藤田秀二, 堀彰, 堀内一穂, 三宅隆之, 宮本淳, 本山秀明

極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM)　2010　2010
P130 過去千年に亘る継続的な数十年周期のグリーンランド気温変動(ポスターセッション)

小端拓郎, 仲江川敏之, 川村賢二

大会講演予講集　97　247-247　2010
Publisher: 日本気象学会

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Books and Other Publications 2

Implementing urban decarbonization

2023/04/26

ISBN: 4886618545
Urban Decarbonization

Takuro Kobashi

Taiga Publishing Co.　2021/10/06

ISBN: 4886618537

Presentations 26

Decarbonizing residential houses in Bali, Indonesia with the integration of rooftop photovoltaics and electric vehicles

Atika, R. K., T. Kobashi

PVSEC 35, Numazu　2024/11
Adoption of PV+EV integration for deep decarbonization in Bali, Indonesia

Atika, R. K., T. Kobashi

International Conference on Applied Energy (ICAE2024)　2024/09
Green hydrogen and Solar EV City Concept in Santiago-Chile

Kato, J. C., T. Kobashi

International Conference on Applied Energy(ICAE2024) in Niigata　2024/09
Stranded asset from city level energy transition in Hanoi, Vietnam

Trang, N. T. Q., T. Kobashi

International Conference on Applied Energy (ICAE2024) in Niigata　2024/09
Establishing decarbonization strategies for Chinese cities using rooftop PVintegrated with EVs – A case study in Qingdao

Dong, Z., T. Kobashi

Applied Energy conference (CUE), Shenzhen　2024/05
PV+EV”potentiols of 1896 municipalities of Japan

Okada, K., T. Kobashi

15th International Conference on Applied Energy(ICAE)　2023/12
1km mesh analyses of cities for decarbonization potentials of rooftop PV integratedwithEVsas battery

Kobashi, T., J. Xiao

15th International Conference on Applied Energy(ICAE) in Doha　2023/12
京都トランジッション研究 Invited

小端拓郎

京都大学経済学研究所シンポジウム「地域から脱炭素社会を築く」　2022/11/05
The Energy-Economic-Environmental Multi-benefits of Urban Rooftop Photovoltaic Integrated with Electric Vehicles System

Liya Xue, Junling Liu, Mengyue Li, Takuro Kobashi

2022/08/10
SolarEV City concept in Paris and Ile-de-France: a promising idea?

Deroubaix, P, Kobashi, T, Gurriaran, L, Benkhelifa, F, Ciais, P, Tanaka, K

International Conference of Applied Energy 2022 (ICAE 2022)　2022/08/11
屋根上PVとEVによる都市の脱炭素化１kmメッシュ評価

小端拓郎, 平野勇二郎

第41回エネルギー・資源学会研究発表会　2022/08/09
グローバルSolarEVシティー構想の可能性

小端拓郎, LIU Junling, CHANG Soowon, CHOI Junyoung, KANG Junsuk

第38回エネルギーシステム・経済・環境コンファレンスプログラム　2022/01/26
Socio-techno-economic transition towards net-zero by 2050 in Kyoto

Takuro Kobashi, Eric Zusman, Masaru Yarime, Yoko Kawai

12th EcoDesing 2021　2021/12/01
CO2実質ゼロ排出に向けた都市のトランジッション研究: SolarEVシティ構想と京都未来門プロジェクト

小端拓郎

環境経済・政策学会2021年大会　2021/09/25
Socio-technical transition toward net zero emission Kyoto by 2050

Takuro Kobashi, Masaru Yarime, Eric Zusman, Yoko Kawai

2021/08/03
U rban dec arbo nization pote ntials with PV, battery, and EV at central urban and residential areas in Japan

Takuro Kobashi, Choi Younghun, Yujiro Hirano, Yoshiki Yamagata

2021/01/26
Techno-economic assessment on PV systems integrated with batteries and electric vehicles in residential area and urban district in Japan

Kobashi, T, Younhun, C, Hirano, Y, Yamagata, Y

International Conference on Applied Energy (ICAE)　2020/12/05
Decarb oniz ing E igh t C ities in Japan and S pecial D istricts of Tokyo using PV and EV

Takuro Kobashi, Jittrapirom Peraphan, Takahiro Yoshida, Yoshiki Yamagata

2020/07/29
日本の都市における PV 、蓄電池、 EV を使ったコスト最適な脱炭素化の道筋

小端拓郎, 吉田崇紘, 山形与志樹

第36回エネルギーシステム・経済・環境コンファレンス　2020/01/28
Pathways to decarbonize urban energy systems with PV, batteries, and electric mobility: A case study for Kyoto, Japan International-presentation

Takuro Kobashi

International Conference on Applied Energy (ICAE)　2019/08/14
Techno-economic analyses of PV, PV + battery, PV + EV for household in Kyoto and Shenzhen towards 2030

Kobashi, T, K. Say, J. Wang, M. Yarime

Japan Society of Energy and Resources　2019/01/30
Techno-economic assessment of the residential photovoltaic systems integrated with electric vehicles: A case study of Japanese households towards 2030 International-presentation

Takuro Kobashi

ICAE 2018 Hong Kong (Applied Energy)　2018/08/24
Precise Holocene temperature change and its causes estimated from trapped air in Greenland ice cores International-presentation

Takuro Kobashi

Goldschmidt conference　2016/06
Greenland temperatures over the Holocene International-presentation

Takuro Kobashi

IPICS　2016/03
Evidence for solar-induced AMOC variability from Greenland temperature records over the past 2000 years International-presentation

Takuro Kobashi

IUGG　2015/06
Volcanically active periods induced multidecadal to centennial Greenland cooling episodes during the past 2,100 years International-presentation

Takuro Kobashi

International Conference on Volcanoes, Climate, and Society, Bicentenary of the great Tambora eruption　2015/04

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Research Projects 13

Rooftop PV and EV as battery with bi-directionally charging for urban decarbonization Competitive

Takuro Kobashi

2024/04 - 2027/03
Deep decarbonization pathways of urban districts through rooftop photovoltaics and decarbonization technologies Competitive

Takuro Kobashi

2023/04 - 2026/03
Urban decarbonization using renewable energy, EV, hydrogen systems

Takuro Kobashi

2024/04 - 2025/03
Survey for a pilot project of rooftop PV + EV Collaborative (industry/university)

Takuro Kobashi

Offer Organization: Asia Development Bank

Institution: Tohoku University

2023/10 - 2024/12
Urban region carbon mapping 2022 Competitive

Takuro Kobashi

Offer Organization: Ministry of Environment

2022/06 - 2023/03
Strategic and practical transition research to establish city energy systems sustainable for the next 1,000 years Competitive

Takuro Kobashi

Offer Organization: Research Institute for Humanity and Nature

System: Feasibility Study

2019/04 - 2020/03
Study for energy transition policy and strategy towards RE100% Asian cities Competitive

Takuro Kobashi

Offer Organization: Research Institute for Humanity and Nature

System: Incubation study

2018/10 - 2019/03
Investigation of Greenland temperature variability over the 6000 years using trapped air in ice cores Competitive

Takuro Kobashi

Offer Organization: European Commission

System: Marie Curie Fellow

2014/03 - 2016/04

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Marie Curie Fellow (EUR 277,296,80)
Warming events and their impacts during the past 150,000 years viewed from Greenland ice

Azuma Kumiko, KAWAMURA Kenji, FUJITA Shuji, UETAKE Jun, MOTOYAMA Hideaki, HIRABAYASHI Motohiro, KOBASHI Takuro, TAKAMURA Chikako, KURAMOTO Takayuki, SEGAWA Takahiro, AOKI Shuji, AZUMA Nobuhiko, IIZUKA Yoshinori

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (S)

Institution: National Institute of Polar Research

2010/04/01 - 2016/03/31

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We analyzed the ice core drilled under the international project North Greenland Eemian Ice Drilling. The air temperature during the warmest period of Eemian interglacial was warmer than the present by 8℃±４℃, which caused extensive surface melt in north Greenland. The thickness of the northwest Greenland ice sheet decreased by 400±250ｍ during 6000 years, which was much smaller than that had been expected. Mass loss of Antarctic ice sheet should have played a role in sea-level rise during the Eemian. Variations of methane, nitrous oxide, noble gases in the air extracted from the ice core, and those of ionic species and bacterial cell concentrations in ice provided us with valuable information on changes in atmospheric circulation, vegetation, microbial activities, mean ocean temperature etc during the warm periods and abrupt warming events.
Physical processes of formation of climate signals in deposited snow in inland plateau of the Antarctic Ice Sheet

FUJITA Shuji, HACHIKUBO Akihiro, IIZUKA Yoshinori, HORI Akira, KAWAMURA Kenji, KOBASHI Takuro, KIM Koui, KIPFSTUHL Josef

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: National Institute of Polar Research

2012/04/01 - 2015/03/31

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In order to better understand the physical processes of formation of climate signals in deposited snow in inland plateau of the Antarctic Ice Sheet of polar firn, firn cores from Dome Fuji, Antarctica and NEEM Camp, Greenland, were investigated. Layers with initially smaller density and smaller geometrical anisotropy deform preferentially throughout the densification process due to textural effects. Second, layers having a higher concentration of chloride and/or fluoride ions deform preferentially during a limited period from the ice sheet surface until smoothing out of layered ions by diffusion. We hypothesize that these ions softened firn due to modulation of dislocation movement. Moreover, firn differs markedly between the sites in terms of strength of geometrical anisotropy, mean rate of densification, and density fluctuation. We hypothesize that these differences are caused by textural effects resulting from differences in depositional conditions within various spatial scales.
Reconstruction of Dome Fuji temperature over the past 4000 years Competitive

Takuro Kobashi

Offer Organization: JSPS

System: KAKENHI

Category: Grant-in-Aid for Young Scientists (B)

Institution: National Institute of Polar Research

2013/04 - 2015/03

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We reconstructed Dome Fuji temperature (East Antarctica) over the past 4000 years using argon and nitrogen isotopes trapped in ice cores. Currently, Dome Fuji has annual temperature of around -50 C and annual accumulation rate of around 3 cm, which make reconstructed temperature to be lower resolution than that for Greenland ice cores. Therefore, we conducted analyses for every 70 years. We obtained high precision for argon and nitrogen isotopes similar to our earlier analyses for Greenland ice cores. Using these data, we calculated temperatures, which show low temperature around 1500 AD, and high temperature around 1000 AD. We plan to use climate models to investigate the causes of these changes.
Mechanisms of glacial-interglacial climatic changes explored with Antarctic ice core analyses and climate modeling

KAWAMURA Kenji, ABE Ayako, YOSHIMORI Masakazu, SAITO Fuyuki, NAKAZAWA Takakiyo, AOKI Shuji, MOTOYAMA Hideaki, AZUMA Kumiko, HIRABAYASHI Motohiro, KOBASHI Takuro, SUZUKI Kazue, UEMURA Ryu, SEVERINGHAUS Jeffrey P., CHAPPELLAZ Jerome, PARRENIN Frederic, MAUREEN Raymo, LISIECKI Lorraine

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Young Scientists (S)

Institution: National Institute of Polar Research

2009/05/11 - 2014/03/31

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We analyzed the Dome Fuji ice core from Antarctica for major greenhouse gases (CO_2, CH_4 and N_2O), as well as other gases including the concentrations of Kr and Xe that may be used as proxies for mean ocean temperature. In particular, we accurately dated the core with O_2/N_2 ratio, for the first time, and made advancement on understanding of the mechanisms of glacial-interglacial cycles by statistical test of termination timings and climate-ice sheet modeling. Our results show that the terminations are more closely related with precession than with obliquity. Moreover, for the past 400 kyr, the 100-kyr periodicity of glacial cycles was not primarily caused by CO_2 forcing, but it was caused by orbital forcing and resulting interactions within the Earth system (in particular, hysteresis response of north American ice sheet to climate, and interaction between ice sheet and bedrock). The reliability of Kr and Xe data were carefully confirmed by measuring several ice cores from both Antarctica and Greenland, and the variations of mean ocean temperature over the last glacial termination were reconstructed, for the first time, from these gases in the past atmosphere.
High precision Greenland temperature reconstruction over the past 2000 years using a new method of measuring gasses in trapped air in ice cores Competitive

Takuro Kobashi

Offer Organization: JSPS

System: KAKENHI

Category: Grant-in-Aid for Young Scientists (B)

Institution: National Institute of Polar Research

2011/04 - 2013/03

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Greenland temperature change affects melting of Greenland ice-sheet, which in turn cause global sea-level change. Therefore, it is critical to understand Greenland temperature change and the mechanisms. With this KAKENHI, the extraction line and system to reconstruct temperature has been established, and the measurements for the past 2000 years of NGRIP ice core have been completed with good precision. Finally, it was found that NGRIP experienced a similar temperature history with GISP2 over the past 2000 years.

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Media Coverage 4

京都大学経済研究所シンポジウム「地域から脱炭素社会を築く」採録記事

日経新聞　大阪版夕刊

2022/12/16

Type: Newspaper, magazine
SolarEVシティーに関するコメントが掲載

ヴィズオンプレス株式会社　PVeye12月号

2022/12

Type: Newspaper, magazine
SolarEV City Concept

CNBC Asia

2021/09/25

Type: TV or radio program
Solar EV City Concept

TBS　WBS

2021/06/03

Type: TV or radio program