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J-GLOBAL ID：200901093664060201 Update date: Apr. 08, 2025

Ohkouchi Naohiko

オオコウチナオヒコ | Ohkouchi Naohiko

Affiliation and department：
Homepage URL (1)： http://www.jamstec.go.jp/biogeochem/member/ohkouchi/index.html

Research field (1)： Biogeoscience

Research theme for competitive and other funds (37)：

2023 - 2029 微量高速C-14分析による水圏炭素動態解明手法の開発
2023 - 2026 ポルフィリン窒素同位体比を用いた地球内部窒素の解析
2021 - 2025 Long-term fluctuation of marine productivity and its impact on humans in Hokkaido
2020 - 2023 A study on Longterm Environmental changes and Wethering
2020 - 2023 Analysis of Anthropocene with biological archives: A case study in Lake Biwa

2018 - 2022 Reconstruction of eruption history of Mt. Fuji based on compound-specific radiocarbon dating of lake sediment

2017 - 2022 過去の大規模な気候変動における氷床・海洋・大気の相互作用の解明

2018 - 2021 Presence and chirality of sugars formed in the early solar system: a new origin of biomolecule

2017 - 2020 A study on rapid climate and low latitude atmosphere and ocean coupling.

2016 - 2019 Deepen the nitrogen cycle in the paleoceanography

2014 - 2017 Detection of carbon from deep mantle

2014 - 2017 Ice sheet fluctuations in the past and global climate changes

2013 - 2016 Ecological roles of large-sized jellyfish in symbiosis

2013 - 2016 Development of molecular level isotope techniques to analyze ecosystems

2013 - 2016 Development of sediment chronologies with amino acid radiocarbon dating

2013 - 2016 Understanding the interaction between abrupt climate change and glacial cycle using earth system modeling

2013 - 2015 A search of novel surrogates of sterols in anaerobic eukaryotes

2010 - 2013 Investigation of paleo-nitrogen cycle

2007 - 2012 Promoting research in Integrated Ocean Drilling Program (IODP): towards establishing the international leadership

2008 - 2009 Development of enantiomer-specific isotope analysis (ESIA) of amino acids

2007 - 2009 Reconstruction of West Antarctic Ice Sheet during the Holocene

2007 - 2008 海洋表層における光従属栄養プロセスの解析

2006 - 2008 Reconstruction and system analyses of the global events of the Earth during the Paleoproterozoic

2005 - 2007 HIGH RESOLUTIONAL RECONSTRUCTION OF TROPICAL ENVIRONMENTS AND EVALUATION OF LINKAGE BETWEEN HIGHLATITUDE ICEASHEETSAND LOALATITUDE ENVIRONMENTS

2004 - 2007 Shallow water chemosynthetic assemblages occur in response to glacio-eustasy

2003 - 2005 High resolution analysis of paleoenvironment and material transport during the hot-house Earth system

2002 - 2004 Study of snowball Earth events and rise of the atmospheric oxygen based on geologicalg survey of glacial sediments of the Paleoproterozoic

2002 - 2004 The study of impact of Antarctic ice melting event since Last Glacial Maximum for global environmental change

2001 - 2002 硫化水素生物圏の提唱とその実態の解明 -地下生物圏に関する基礎的研究-

1998 - 2001 AMS radiocarbon measurements of individual organic molecules : making preparative capillary GC system and its application to geochemical samples

1998 - 2000 Environmental changes from greenhouse earth to icehouse earth through a study of chalk/black shale sequence

1998 - 2000 Studies on chemistry and cycles of halogens in the troposphere

1997 - 2000 Organic geochemistry of polar ice and snow

1998 - 1999 北太平洋高緯度域における氷床触解期の海洋表層水温の変動特性の解明

1997 - 1998 不飽和脂肪酸の光化学的変質に関する実験的研究:古大気の酸化能力推定法の検討

1997 - 1997 黒色頁岩の形成が地球環境へ及ぼしたインパクトの定量的評価

1996 - 1996 黒色頁岩:その形成メカニズムと物質循環モデルの構築

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Papers (342)：

Toshihiro Yoshimura, Naoto F. Ishikawa, Nanako O. Ogawa, Soichiro Kusaka, Shigeyuki Wakaki, Tsuyoshi Ishikawa, Kazuya Nagaishi, Masanori Kaneko, Yuta Isaji, Yoshito Chikaraishi, et al. Magnesium isotopic variation in marine fish organs. Progress in Earth and Planetary Science. 2025. 12. 1
Toshiki Koga, Yoshinori Takano, Nanako O. Ogawa, Emily H. Hollingsworth, Yasuhiro Oba, Naohiko Ohkouchi. Compound-Specific Carbon and Nitrogen Isotopic Analyses of Underivatized Pyrimidine and Purine Nucleobases. ACS Earth and Space Chemistry. 2025. 9. 3. 424-432
Hironao Matsumoto, Kotaro Shirai, Akira Ishikawa, Naohiko Ohkouchi, Nanako O. Ogawa, Maria Luisa G. Tejada, Atsushi Ando, Junichiro Kuroda, Katsuhiko Suzuki. Multidisciplinary evidence for synchroneity between Ontong Java Nui volcanism and early Aptian oceanic anoxic event 1a. Science Advances. 2025. 11. 9
Hiroto Kajita, Yusuke Suganuma, Yuki Haneda, Makoto Okada, Masanobu Yamamoto, Osamu Seki, Naohiko Ohkouchi. Seasonal Sea Surface Temperature Variations at the Northern Limit of the Kuroshio Current in Marine Isotope Stage 20-18. Geophysical Research Letters. 2025. 52. 3
Yuta Isaji, Koji Sugie, Naoto F. Ishikawa, Nanako O. Ogawa, Kazuhiko Matsumoto, Chisato Yoshikawa, Hajime Obata, Makio C. Honda, Naohiko Ohkouchi. Distributions of heme B and its implications on Fe biogeochemistry in the eastern Indian Ocean and the western North Pacific Ocean. Progress in Earth and Planetary Science. 2025. 12. 1

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MISC (139)：

黒田潤一郎, 黒田潤一郎, 諸野祐樹, 松崎賢史, 菅寿美, 亀尾桂, 森郁晃, 森郁晃, 森尚仁, 蘭慧, et al. 新青丸KS-23-5次航海速報. 海と地球のシンポジウム発表課題一覧・要旨集(CD-ROM). 2024. 2023
伊左治雄太, 吉村寿紘, 荒岡大輔, 栗栖美菜子, 大河内直彦. Method development of stable iron isotope analysis of heme. 日本地球化学会年会要旨集(Web). 2023. 70th
梶田展人, 関宰, 山本正伸, 大河内直彦, 岡田誠, 羽田裕貴, 菅沼悠介. 千葉複合セクションのn-アルカン分析による海洋酸素同位体ステージ19の陸上気候・植生変動復元. 日本地球化学会第69回年会講演要旨集. 2022
梶田展人, 中澤努, 大河内直彦, 佐藤都, 原田尚美, 川幡穂高. 下総層群に含まれるアルケノンを用いた古東京湾の古水温復元. 日本地球化学会第68回年会講演要旨集. 2021
古知武, 黒田潤一郎, 小川奈々子, 吉村寿紘, 宮崎隆, VAGLAROV Bogdan Stefanov, 大河内直彦. Reconstruction of the Mediterranean sulfur cycle during the Messinian salinity crisis using evaporites. 日本地球惑星科学連合大会予稿集(Web). 2021. 2021

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Books (9)：

石油のものがたり
福音館書店 2017
チェンジング・ブルー : 気候変動の謎に迫る
岩波書店 2015 ISBN:9784006032807
地球の履歴書
新潮社 2015 ISBN:9784106037764
安定同位体比精密測定のためのマニュアル : Accurate measurements of carbon and nitrogen stable isotope ratio by EA/IRMS
日本分析センター 2013 ISBN:9784907305000
「地球のからくり」に挑む
新潮社 2012 ISBN:9784106104725

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Work history (5)：

2019 - 現在 Japan Agency for Marine-Earth Science and Technology Research Institute for Marine Resources Utilization Director-General
2014 - 2019 JAMSTEC Department of Biogeochemistry Director
2009 - 2014 JAMSTEC Institute of Biogeosciences Program Director
2005 - 2009 JAMSTEC Institute for Frontier Research on Earth Evolution Group Leader
2002 - 2005 JAMSTEC Institute for Frontier Research on Earth Evolution Research Scientist

Committee career (9)：

2017 - 現在 American Chemical Society "ACS Earth and Space Chemistry" Editor
2013 - 現在 Organic Geochemistry Division, Geochemical Society Executive Committee Member
2012 - 現在 Geochemical Journal Vice Executive Editor
2009 - 現在日本地球惑星科学連合サイエンスボードメンバー
2009 - 現在日本地球惑星科学連合代議員

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Awards (12)：

2024 - Award from the Prime Minister Promoting Japan as a Maritime Nation
2024 - Miyake Prize
2023 - The Geochemical Society of Japan Award
2022 - Japan Academy Edinburgh Prize
2020 - Organic Geochemistry The Most Cited Organic Geochemistry Articles

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