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Naohiko Ohkouchi

japan agency for marine-earth science and technology

59H-index
522Paper Count
1.3WCitation Count
Published Papers 122
Publication Date
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Distribution of purine and pyrimidine bases in Antarctic carbonaceous meteorites
errGeochimica et Cosmochimica Acta
IF5
err2026-07-06
err0
errOAAI
errYasuhiro Oba; Takuto Tomaru; Toshiki Koga; Yoshihiro Furukawa; Sako Sunami; Toshihiro Yoshimura; Yuta Hirakawa; Nanako O. Ogawa; Naohiko Ohkouchi; Keiko Kuwamoto; Yoshinori Takano; Hiroshi Naraoka
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Estimating the migration pathway of chub mackerel using a state-space model with nitrogen isoscapes and compound-specific nitrogen isotope analysis
errProgress in Oceanography
IF3.6
err2026-05-01
err0
errOAAI
errSakamoto, Kohei; Yoshikawa, Chisato; Ogawa, Nanako O.; Osada, Yutaka; Ishikawa, Naoto F.; Ito, Shin-ichi; Yokoyama, Yusuke; Ohkouchi, Naohiko
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A complete set of canonical nucleobases in the carbonaceous asteroid (162173) Ryugu
errNature Astronomy
IF14.3
err2026-03-16
err0
errOAAI
errToshiki Koga; Yasuhiro Oba; Yoshinori Takano; Hiroshi Naraoka; Nanako O. Ogawa; Kazunori Sasaki; Hajime Sato; Toshihiro Yoshimura; Naohiko Ohkouchi
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Tracing terrestrial nitrogen contributions to the salt marsh food web of the Obitsu River estuary in Tokyo Bay using compound-specific δ15N analysis of amino acids
errProgress in Earth and Planetary Science
IF2.8
err2026-03-09
err0
errOAAI
errSatoshi Furota; Naoto F. Ishikawa; Nanako O. Ogawa; Toshio Furota; Naohiko Ohkouchi
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Silicate and Carbonate Weathering Perturbation at the Eocene-Oligocene Transition Recorded by Mg Isotopes
errgeochemistry, geophysics, geosystems
IF0
err2026-02-05
err0
errOAAI
errAdam D. Sproson; Toshihiro Yoshimura; Shigeyuki Wakaki; Takahiro Aze; Yusuke Yokoyama; Tsuyoshi Ishikawa; Naohiko Ohkouchi
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Carbon isotopic changes of 16 proteinogenic amino acids during trophic transfer in a cultured marine consumer
errProgress in Earth and Planetary Science
IF2.8
err2026-01-28
err0
errOAAI
errYuchen Sun; Naoto F. Ishikawa; Nanako O. Ogawa; Yoshinori Takano; Naohiko Ohkouchi
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Carbon and Nitrogen Stable Isotopic Profiling of Chimpanzees and Monkeys in Kalinzu Forest Reserve, Uganda
errAmerican Journal of Primatology
IF1.8
err2026-01-01
err0
errOAAI
errTsutaya, Takumi; Aruga, Natsumi; Ishikawa, Naoto F.; Sasaki, Yoko; Kitayama, Haruka; Yoneda, Minoru; Ogawa, Nana O.; Ohkouchi, Naohiko; Hashimoto, Chie
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Nitrogen and carbon flows in a microbial mat involving anaerobic oxidation of methane in northwestern Black Sea: perspectives from nitrogen and carbon isotopic composition of coenzyme F430 and its biosynthetic pathway
errProgress in Earth and Planetary Science
IF2.8
err2025-12-06
err0
errOAAI
errMasanori Kaneko; Yoshinori Takano; Yuta Isaji; Nanako O. Ogawa; Yoshito Chikaraishi; Naoto F. Ishikawa; Hiroyuki Imachi; Yoshihiro Takaki; Miyuki Ogawara; Fumie Kabashima; Martin Krüger; Naohiko Ohkouchi
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Working standards and analytical framework for CSIA: isotopic composition (δ13C, δ15N, and δ34S) of 21 amino acids and 7 nucleobases
errProgress in Earth and Planetary Science
IF2.8
err2025-12-06
err0
errOAAI
errNanako O. Ogawa; Yoshinori Takano; Yu Itahashi; Naoto F. Ishikawa; Naohiko Ohkouchi
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Purification of hydroxyproline for small-scale radiocarbon dating verified using archaeological bone collagen
errProgress in Earth and Planetary Science
IF2.8
err2025-12-01
err0
errOAAI
errYu Itahashi; Yoshinori Takano; Yoshito Chikaraishi; Nanako O. Ogawa; Naoto F. Ishikawa; Naohiko Ohkouchi; Masako Yamane; Yusuke Yokoyama; Minoru Yoneda
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Incomplete oxidative sulfide weathering and low atmospheric oxygen levels during the Great Oxidation Event
errCommunications Earth & Environment
IF8.9
err2025-11-17
err0
errOAAI
errKosuke T. Goto; Yasuhito Sekine; Umi Nakamura; Katsuhiko Suzuki; Ryoko Senda; Naoki Yamada; Yuichiro Ueno; Shogo Tachibana; Naohiro Yoshida; Mariko Harada; Ryuji Tada; Kazuhisa Goto; Shinji Yamamoto; Teruyuki Maruoka; Nanako O. Ogawa; Naohiko Ohkouchi; Yumiko Harigane; Yoshiaki Kon; Gen Shimoda; Simon W. Poulton; Eiichi Tajika
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Nitrogenous sources for summertime phytoplankton at two contrasting stations in the subarctic and subtropical western North Pacific
errProgress in Oceanography
IF3.6
err2025-10-30
err0
errOAAI
errC. Yoshikawa; H. Yamaguchi; N.O. Ogawa; A. Makabe; M. Sato; Y. Mino; K. Matsumoto; Y. Nakano; S. Kawagucci; T. Fujiki; N. Harada; M. Kawachi; N. Ohkouchi
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Nanomolar-scale sulfate sulfur isotope analysis using a combined ion chromatography–barite precipitation and nano-EA/IRMS
errProgress in Earth and Planetary Science
IF2.8
err2025-10-29
err0
errOAAI
errNanako O. Ogawa; Toshihiro Yoshimura; Takeru Kochi; Junichiro Kuroda; Yoshinori Takano; Naohiko Ohkouchi
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Nitrogen isotopic composition of amino acids reveals a variety of trophic ecology of organisms inhabiting chemosynthesis-based ecosystems
errProgress in Earth and Planetary Science
IF2.8
err2025-10-15
err0
errOAAI
errMasashi Tsuchiya; Takao Yoshida; Yoshito Chikaraishi; Nanako O. Ogawa; Hidetaka Nomaki; Yoshihiro Fujiwara; Yasuhiko T. Yamaguchi; Yohei Tada; Robert G. Jenkins; Yoko Sasaki; Katsunori Fujikura; Naohiko Ohkouchi
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Chromatographic isolation for performing enantiomer-specific radiocarbon analysis (ESRA): first method development for individual L- and D-amino acids
errProgress in Earth and Planetary Science
IF2.8
err2025-09-29
err0
errOAAI
errThomas M. Blattmann; Yuchen Sun; Nanako O. Ogawa; Yoshinori Takano; Negar Haghipour; Naoto F. Ishikawa; Timothy I. Eglinton; Naohiko Ohkouchi
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New evaluation of vertical particulate organic carbon fluxes of submillimeter-sized phaeodarians in the mesopelagic twilight zone of the western North Pacific Ocean
errProgress in Earth and Planetary Science
IF2.8
err2025-09-10
err0
errOAAI
errTakahito Ikenoue; Nanako O. Ogawa; Hidetaka Nomaki; Katsunori Kimoto; Makio C. Honda; Naohiko Ohkouchi; Tetsuichi Fujiki
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Correction: Gleaning of δ15N in ecosystems and its animal-organ isotope data: perspectives for the construction of the isotopically ordered world
errProgress in Earth and Planetary Science
IF2.8
err2025-08-26
err0
errOAAI
errEitaro Wada; Yoshihisa Kudo; Hiroshi Mizutani; Hiroshi Minami; Kenji Matsubara; Yoshihiro Yamada; Nanako O. Ogawa; Yukihiro Kohmatsu; Naoko Nishizawa; Isamu Shimizu; Reiichiro Ishii; Fujio Hyodo; Maki N. Aita; Wataru Sakamoto; Naohiko Ohkouchi
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Gleaning of δ15N in ecosystems and its animal-organ isotope data: perspectives for the construction of the isotopically ordered world
errProgress in Earth and Planetary Science
IF2.8
err2025-08-01
err0
errOAAI
errEitaro Wada; Yoshihisa Kudo; Hiroshi Mizutani; Hiroshi Minami; Kenji Matsubara; Yoshihiro Yamada; Nanako O. Ogawa; Yukihiro Kohmatsu; Naoko Nishizawa; Isamu Shimizu; Reiichiro Ishii; Fujio Hyodo; Maki N. Aita; Wataru Sakamoto; Naohiko Ohkouchi
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Nitrogen and carbon isotopic relationships in the diet and eye lenses of chub mackerel revealed in a laboratory rearing experiment
errProgress in Earth and Planetary Science
IF2.8
err2025-07-23
err0
errOAAI
errChisato Yoshikawa; Nanako O. Ogawa; Naoto F. Ishikawa; Michio Yoneda; Ryuji Yukami; Shin-ichi Ito; Naohiko Ohkouchi
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Magnesium isotopic variation in marine fish organs
errPROGRESS IN EARTH AND PLANETARY SCIENCE
IF2.8
err2025-03-06
err0
errOAAI
errYoshimura, Toshihiro; Ishikawa, Naoto F.; Ogawa, Nanako O.; Kusaka, Soichiro; Wakaki, Shigeyuki; Ishikawa, Tsuyoshi; Nagaishi, Kazuya; Kaneko, Masanori; Isaji, Yuta; Chikaraishi, Yoshito; Ohkouchi, Naohiko
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Research Directions

No research directions
Co-authors
Cooperation Journals
G
Graham D. Farquhar
H-index: 137 · Papers: 475
R
Roberto Danovaro
H-index: 100 · Papers: 663
K
Kimitaka Kawamura
H-index: 99 · Papers: 810
J
John Southon
H-index: 96 · Papers: 599
J
Junken Aoki
H-index: 94 · Papers: 571
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