Hiroshi Naraoka

(奈良岡浩)

Profile Information

Affiliation: Institute of Space and Astronautical Science （ISAS), Japan Aerospace Exploration Agency (JAXA)

J-GLOBAL ID: 200901062976601762
researchmap Member ID: 1000165923

Research Interests

Research Areas

Natural sciences / Space and planetary science /

Research History

Apr, 2026 - Present

宇宙科学研究所, 宇宙航空研究開発機構
Feb, 2008 - Mar, 2026

九州大学大学院理学研究院教授
2004 - 2008

岡山大学理学部教授
1997 - 2004

東京都立大学大学院理学研究科助教授
1993 - 1997

Faculty of Science, Tokyo Metropolitan University

Education

- 1990

University of Tsukuba
- 1990

Graduate School, Division of Chemistry, University of Tsukuba
- 1983

University of Tsukuba
- 1983

First Cluster of College, University of Tsukuba

Papers

209

Direct observation of organic molecules in asteroid ryugu revealed by high-resolution atomic force microscope

Kota Iwata, Yasuhiro Oba, Hiroshi Naraoka, Hikaru Yabuta, Shogo Tachibana, Yoshiaki Sugimoto

Nature Communications, Apr 14, 2026
Initial study of regolith exposure ages and burial conditions on Ryugu: Cosmogenic nuclides score in two touchdowns

Kunihiko Nishiizumi, Keisuke Nagao, Marc W. Caffee, Ryuji Okazaki, Jozef Masarik, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Hiroshi Naraoka, Hikaru Yabuta, Kanako Sakamoto, Kasumi Yogata, Toru Yada, Shogo Tachibana, Sei-ichiro Watanabe, Yuichi Tsuda, Masanao Abe, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Hirotaka Sawada, Satoshi Tanaka, Tomohiro Usui, Koji Wada, Hajime Yano, Makoto Yoshikawa

METEORITICS & PLANETARY SCIENCE, Feb 23, 2026
Direct comparison of the chemical composition of alkylated CHN compounds and mineral composition in the Murchison meteorite

Narumi Arai, Hiroshi Naraoka, Koichi Mimura, Minako Hashiguchi

GEOCHEMICAL JOURNAL, 2026
An I-Xe age 8 Myr after solar system formation in a Hayabusa2 sample records alteration on the parent planetesimal of asteroid Ryugu

S.A. Crowther, J.S. Cowpe, L. Fawcett, J.D. Gilmour, R. Okazaki, F. Kitajima, T. Yada, S. Tachibana, K. Yogata, K. Sakamoto, H. Yurimoto, T. Nakamura, T. Noguchi, H. Naraoka, H. Yabuta, S. Watanabe, Y. Tsuda, M. Nishimura, A. Nakato, A. Miyazaki, M. Abe, T. Okada, T. Usui, M. Yoshikawa, T. Saiki, S. Tanaka, F. Terui, S. Nakazawa, H. Busemann, K. Hashizume, B. Marty, A. Meshik, M.E.I. Riebe, D. Krietsch, C. Maden, A. Ishida, P. Clay, T. Lawton, M.W. Broadley, D.J. Byrne, E. Füri, L. Zimmermann, O. Pravdivtseva, Y.N. Miura, J. Park, K. Bajo, Y. Takano, K. Yamada, S. Kawagucci, Y. Matsui, M. Yamamoto, K. Righter, S. Sakai, N. Iwata, N. Shirai, M. Inagaki, M. Ebihara, K. Nishiizumi, K. Nagao, J.I. Lee, A. Kano, M.W. Caffee, R. Uemura

Geochimica et Cosmochimica Acta, 413 218-232, Jan, 2026
Bio-essential sugars in samples from asteroid Bennu

Yoshihiro Furukawa, Sako Sunami, Yoshinori Takano, Toshiki Koga, Yuta Hirakawa, Yasuhiro Oba, Hiroshi Naraoka, Daisuke Saigusa, Takaaki Yoshikawa, Satoru Tanaka, Daniel P. Glavin, Jason P. Dworkin, Harold C. Connolly, Dante S. Lauretta

NATURE GEOSCIENCE, Dec 2, 2025

Misc.

TOF-SIMS analysis of macromolecular organic matter in Ryugu samples.

橋口未奈子, 青木弾, 福島和彦, 薮田ひかる, 圦本尚義, 中村智樹, 野口高明, 岡崎隆司, 奈良岡浩, 坂本佳奈子, 橘省吾, 橘省吾, 渡邊誠一郎, 津田雄一

日本地球化学会年会要旨集(Web), 71st, 2024
Distribution of Hydrous Asteroids Inferred from Hydrogen Isotopic Compositions of Hydrous Mineral in Carbonaceous Chondrites

奈良岡浩, 圦本尚義

日本地球化学会年会要旨集(Web), 70th, 2023
TOF-SIMS analysis of organic matter in Ryugu samples.

橋口未奈子, 青木弾, 福島和彦, 薮田ひかる, 圦本尚義, 中村智樹, 野口高明, 岡崎隆司, 奈良岡浩, 坂本佳奈子, 橘省吾, 橘省吾, 渡邊誠一郎, 津田雄一

日本地球惑星科学連合大会予稿集(Web), 2023, 2023
SPECTRAL EMISSIVITY OF A PARTICLE FROM THE ASTEROID RYUGU

太刀川純孝, 星野遼, 田中智, 中村智樹, 中嶋大輔, 圦本尚義, 野口高明, 岡崎隆司, 薮田ひかる, 奈良岡浩, 坂本加奈子, 橘省吾, 渡邊誠一郎, 津田雄一

Thermophysical Properties (CD-ROM), 43rd, 2022
THERMAL DIFFUSIVITY OF A SLICED PARTICLE FROM THE ASTEROID RYUGU USING SPOT HEATING RADIATION THERMOMETRY COMBINED WITH 3D MODEL ANALYSIS

八木貴志, 山下雄一郎, 田中智, 中村智樹, 森田朋代, 菊入瑞葉, 天野香菜, 加川瑛一, 圦本尚義, 野口高明, 岡崎隆司, 薮田ひかる, 奈良岡浩, 坂本佳奈子, 橘省吾, 渡邊誠一郎, 津田雄一

Thermophysical Properties (CD-ROM), 43rd, 2022

Professional Memberships

Works

Research Projects

Chemical evolution of organic compounds and aqueous salts in carbonaceous asteroids

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2023 - Mar, 2027
The Chemical Environment of the Solar System during its Formation

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Nov, 2020 - Mar, 2025
小惑星リュウグウから探る太陽系有機化合物の進化

科学研究費助成事業, 日本学術振興会, Apr, 2020 - Mar, 2024

奈良岡浩, 濱瀬健司
Unveiling life-building materials on the early-Earth by analyzing organic materials in Antarctic micrometeorites

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2018 - Mar, 2021

Yada Toru
Advanced Trace Organic Compound Study in Planetary Materials: Development of High Sensitivity and High Resolution

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, May, 2015 - Mar, 2020

Naraoka Hiroshi
Development of project on molecular evolution in space to international cooperation and interdisciplinary research

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Nov, 2015 - Mar, 2018

KOUCHI Akira, NAGAHARA Hiroko, FUKAZAWA Tomoko, YAMAMOTO Satoshi, YURIMOTO Hisayoshi, NARAOKA Hiroshi
Analyses of organic astromaterials: Isotopes and structures

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Jun, 2013 - Mar, 2018

YURIMOTO HISAYOSHI
Evolution of molecules in space:from interstellar clouds to proto-planetary nebula

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Jun, 2013 - Mar, 2018

KOUCHI Akira, NAGAHARA Hiroko, FUKAZAWA Tomoko, YAMAMOTO Satoshi, YURIMOTO Hisayoshi, NARAOKA Hiroshi, WATANABE Junichi
Quantification of methanogenic potential with coenzyme F430 analysis

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2013 - Mar, 2016

Kaneko Masanori, OHKOUCH Naohiko, TAKANO Yoshinori, NARAOKA Hiroshi, SHIMA Seigo, WATANABE Kenji
Chemical structure and isotopic composition of the most primitive organic matter in the solar system

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2011 - Mar, 2015

NARAOKA Hiroshi, HASHIZUME Ko, YAMASHITA Yohei
Reconstracted ocean floor cross-section during Archean to Proterozoic

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2010 - Mar, 2014

KIYOKAWA Shoichi, ITO Takashi, IKEHARA Minoru, YAMAGUCHI Kosei, HORIE Kenji, SUGANUMA Yusuke, ONOUE Tetsuji, NARAOKA Hiroshi
Isotope and trace element geochemistry of Archean chert : Deciphering the ancient oceanic environment and biological activity

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2008 - 2011

YAMAGUCHI Kosei, KATO Yasuhiro, SUZUKI Katsuhiko, KIYOKAWA Shoichi, NEDACHI Munetomo, NARAOKA Hiroshi, ITO Takashi, IKEHARA Minoru
海底下の有機化合物バイオマーカーの炭素・水素同位体組成と生物活動

科学研究費助成事業, 日本学術振興会, 2009 - 2010

奈良岡浩
Studies on fundamental processes on mass-independent isotope fractionation of sulfur compounds in photochemical rea ctions

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2008 - 2010

NARAOKA Hiroshi, POULSON SIMON, MORIWAKI Emi
Reconstracted ocean floor environment at Acehan and Proterozoic

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2006 - 2009

KIYOKAWA Shoichi, ITO Takeshi, IKEHARA Minoru, YAMAGUCHI Kosei, NARAOKA Hiroshi
Formulation of Evolution Scenario from Interstellar Organics to Life-Building Molecular Systems by Simulation Experiments and Analysis of Meteorites

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2005 - 2008

KOBAYASHI Kensei, NARAOKA Hiroshi, MITA Hajime, HASHIMOTO Hirofumi, KANEKO Takeo, TAKANO Yoshinori, VLADIMIR A. Tsarev
Multi-stable isotope systematics of individual organic compounds in cosmogeochemical samples

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2003 - 2006

NARAOKA Hiroshi
Joint International Research Project on Free Oxygen and Biomarker on the Early Earth

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2002 - 2004

NEDACHI Munetomo, KAKEGAWA Takeshi, NARAOKA Hiroshi, HAYASHI Kenitiro, KATO Yasuhiro, NEDACHI Yoko
DEVELOPMENT OF ACID RAIN MONITORING NETWORK SYSTEM USING GLOBAL POSITIONING SYSTEM AND ITS FIELD EVALUATION IN CHINA

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2001 - 2003

KORENAGA Takashi, MURATA Akihiro, OCHIAI Masahiro, NARAOKA Hiroshi, SUSAKI Hironori
Archean biological activity evolved with environ mental changes of the earth's surface inferred from biomarkers and stable isotopic compositions

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2000 - 2002

NARAOKA Hiroshi
Compound-specific stable hydrogen isotope analysis of natural samples in nano-molar levels and its application to earth environmental sciences

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2000 - 2002

NARAOKA Hiroshi
対流圏有機エアロゾルの起源推定のための分子炭素同位体組成リストの作成

科学研究費助成事業, 日本学術振興会, 1999 - 1999

石渡良志, 奈良岡浩
Evolution of the Atmosphere, Ocean, Crust, and Biosphere

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 1998 - 1999

NEDACHI Munetomo, NEDACHI Yoko, NARAOKA Hiroshi, HAYASHI Kenichiro, KAKEGAWA Takeshi
Geochemical cycles of organic compounds in terrestrial-marine environments using compound-specific carbon isotope ratios

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 1997 - 1999

NARAOKA Hiroshi, ISHIWATARI Ryoshi
Compound-specific carbon isotope analysis of low-molecular organic acids and its application to geochemical samples

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 1997 - 1999

NARAOKA Hiroshi, KOMIYA Masatoshi, ISHIWATARI Ryoshi
対流圏有機エアロゾルの起源推定のための分子炭素同位体組成リストの作成

科学研究費助成事業, 日本学術振興会, 1998 - 1998

石渡良志, 奈良岡浩
Formation and evolution of kerogen as revealed by molecular and isotopic studies

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 1996 - 1998

ISHIWATARI Ryoshi, YAMAMOTO Shuichi, NARAOKA Hiroshi
バイオマーカー分子の同位体組成による過去の気候変動解読に関する研究

科学研究費助成事業, 日本学術振興会, 1997 - 1997

南川雅男, 中塚武, 三島康史, 奈良岡浩, 岡田尚武, 石渡良志
有機分子炭素同位体比測定による生物大量絶滅事変記録の解析

科学研究費助成事業, 日本学術振興会, 1997 - 1997

石渡良志, 山本修一, 奈良岡浩
生物大量絶滅事変境界層の有機・同位体地球化学的研究

科学研究費助成事業, 日本学術振興会, 1996 - 1996

石渡良志, 山本修一, 奈良岡浩
堆積岩有機分子の有機・同位体地球化学的解析

科学研究費助成事業, 日本学術振興会, 1995 - 1995

石渡良志, 山本修一, 奈良岡浩
Surface Enviroments, Biological Activities and Elemental Cycles of the Early Earth

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 1991 - 1994

OHMOTO Horoshi, KAKEGAWA Takeshi, NARAOKA Hiroshi, HAYASHI Ken-ichiro
"Formational mechanisms and materials properties of iron sulfides"

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 1990 - 1992

OHMOTO Hiroshi TSUKAMOTO Katsuo, K.OSSEO-ASARE, NARAOKA Hiroshi, KITAKAZE Arashi, HAYASHI Ken-ichiro, SHIMADA Masahiko, HIRAI Toshio, SIMON R.Poulson, URSULA M.Graham, LEE M.Kump
始生代堆積岩の有機地球化学的研究

1985
炭素質隕石中の有機化合物の研究

1985
堆積物中の有機化合物の同位体の研究

1985
生命の起源と化学進化

1983
Organic Cosmogeochemistry
Origins of life and chemical evolution
Organic geochemistry of Archean sedimentary rocks
Organic compounds in carbonaceous meteorites
Stable carbon isotopic composition of individual organic molecules in sediments

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