arrow
Back
T

Toshiki Koga

japan agency for marine-earth science and technology

16H-index
48Paper Count
1.2KCitation Count
Published Papers 16
Publication Date
Distribution of purine and pyrimidine bases in Antarctic carbonaceous meteorites
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
errShare
errSave
Distribution of extraterrestrial nucleobases, other N-heterocycles, and their precursors in a sample from asteroid Bennu
err2026-04-02
err0
errOAAI
errYasuhiro Oba; Toshiki Koga; Yoshinori Takano; Hiroshi Naraoka; Yuta Hirakawa; Sako Sunami; Yoshihiro Furukawa; Tomoya Yamazaki; Takuto Tomaru; Jason P. Dworkin; Daniel P. Glavin; Harold C. Connolly; Dante S. Lauretta
errShare
errSave
A complete set of canonical nucleobases in the carbonaceous asteroid (162173) Ryugu
err2026-03-16
err0
errOAAI
errToshiki Koga; Yasuhiro Oba; Yoshinori Takano; Hiroshi Naraoka; Nanako O. Ogawa; Kazunori Sasaki; Hajime Sato; Toshihiro Yoshimura; Naohiko Ohkouchi
errShare
errSave
Bio-essential sugars in samples from asteroid Bennu
err2025-12-02
err0
errOAAI
errYoshihiro 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
errShare
errSave
Placing asteroid Bennu’s organic solids in molecular and elemental context with those in aqueously altered carbonaceous chondrites
err2025-09-05
err0
PREAI
errGeorge D. Cody; Conel M. O’D. Alexander; Dionysis I. Foustoukos; Robert M. Hazen; Daniel P. Glavin; Jason P. Dworkin; Yoshihiro Furakawa; Toshiki Koga; Harold C. Connolly; Dante S. Lauretta
errShare
errSave
Compound-Specific Carbon and Nitrogen Isotopic Analyses of Underivatized Pyrimidine and Purine Nucleobases
err2025-03-03
err0
PREAI
errKoga, T; Takano, Y; Ogawa, NO; Hollingsworth, EH; Oba, Y; Ohkouchi, N
errShare
errSave
Breunnerite grain and magnesium isotope chemistry reveal cation partitioning during aqueous alteration of asteroid Ryugu
err2024-09-05
err0
errOAAI
errYoshimura, Toshihiro; Araoka, Daisuke; Naraoka, Hiroshi; Sakai, Saburo; Ogawa, Nanako O.; Yurimoto, Hisayoshi; Morita, Mayu; Onose, Morihiko; Yokoyama, Tetsuya; Bizzarro, Martin; Tanaka, Satoru; Ohkouchi, Naohiko; Koga, Toshiki; Dworkin, Jason P.; Nakamura, Tomoki; Noguchi, Takaaki; Okazaki, Ryuji; Yabuta, Hikaru; Sakamoto, Kanako; Yada, Toru; Nishimura, Masahiro; Nakato, Aiko; Miyazaki, Akiko; Yogata, Kasumi; Abe, Masanao; Okada, Tatsuaki; Usui, Tomohiro; Yoshikawa, Makoto; Saiki, Takanao; Tanaka, Satoshi; Terui, Fuyuto; Nakazawa, Satoru; Watanabe, Sei-ichiro; Tsuda, Yuichi; Tachibana, Shogo; Takano, Yoshinori
errShare
errSave
Primordial aqueous alteration recorded in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu
err2024-07-10
err3
errOAAI
errTakano, Yoshinori; Naraoka, Hiroshi; Dworkin, Jason P.; Koga, Toshiki; Sasaki, Kazunori; Sato, Hajime; Oba, Yasuhiro; Ogawa, Nanako O.; Yoshimura, Toshihiro; Hamase, Kenji; Ohkouchi, Naohiko; Parker, Eric T.; Aponte, Jose C.; Glavin, Daniel P.; Furukawa, Yoshihiro; Aoki, Junken; Kano, Kuniyuki; Nomura, Shin-ichiro M.; Orthous-Daunay, Francois-Regis; Schmitt-Kopplin, Philippe; Furusho, Aogu; Hashiguchi, Minako; Fukushima, Kazuhiko; Mclain, Hannah L.; Elsila, Jamie E.; Graham, Heather V.; Eiler, John M.; Hertkorn, Norbert; Ruf, Alexander; Wolters, Cedric; Isa, Junko; Vuitton, Veronique; Thissen, Roland; Sakai, Saburo; Sugahara, Haruna; Mita, Hajime; Chikaraishi, Yoshito; Yoshikawa, Takaaki; Tanaka, Satoru; Morita, Mayu; Onose, Morihiko; Araoka, Daisuke; Kabashima, Fumie; Fujishima, Kosuke; Yamazaki, Tomoya; Kimura, Yuki; Yurimoto, Hisayoshi; Nakamura, Tomoki; Noguchi, Takaaki; Okazaki, Ryuji; Yabuta, Hikaru; Sakamoto, Kanako; Yada, Toru; Nishimura, Masahiro; Nakato, Aiko; Miyazaki, Akiko; Yogata, Kasumi; Abe, Masanao; Okada, Tatsuaki; Usui, Tomohiro; Yoshikawa, Makoto; Saiki, Takanao; Tanaka, Satoshi; Terui, Fuyuto; Nakazawa, Satoru; Watanabe, Sei-ichiro; Tsuda, Yuichi; Tachibana, Shogo
errShare
errSave
Chemical evolution of primordial salts and organic sulfur molecules in the asteroid 162173 Ryugu
err2023-09-18
err19
errOAAI
errYoshimura, Toshihiro; Takano, Yoshinori; Naraoka, Hiroshi; Koga, Toshiki; Araoka, Daisuke; Ogawa, Nanako O.; Schmitt-Kopplin, Philippe; Hertkorn, Norbert; Oba, Yasuhiro; Dworkin, Jason P.; Aponte, Jose C.; Yoshikawa, Takaaki; Tanaka, Satoru; Ohkouchi, Naohiko; Hashiguchi, Minako; Mclain, Hannah; Parker, Eric T.; Sakai, Saburo; Yamaguchi, Mihoko; Suzuki, Takahiro; Yokoyama, Tetsuya; Yurimoto, Hisayoshi; Nakamura, Tomoki; Noguchi, Takaaki; Okazaki, Ryuji; Yabuta, Hikaru; Sakamoto, Kanako; Yada, Toru; Nishimura, Masahiro; Nakato, Aiko; Miyazaki, Akiko; Yogata, Kasumi; Abe, Masanao; Okada, Tatsuaki; Usui, Tomohiro; Yoshikawa, Makoto; Saiki, Takanao; Tanaka, Satoshi; Terui, Fuyuto; Nakazawa, Satoru; Watanabe, Sei-ichiro; Tsuda, Yuichi; Tachibana, Shogo; Hamase, Kenji; Furusho, Aogu; Fukushima, Kazuhiko; Aoki, Dan; Glavin, Daniel P.; Mclain, Hannah L.; Elsila, Jamie E.; Graham, Heather V.; Eiler, John M.; Ruf, Alexander; Orthous-Daunay, Francois-Regis; Wolters, Cedric; Isa, Junko; Morita, Mayu; Vuitton, Veronique; Thissen, Roland; Nomura, Shin-ichiro M.; Sugahara, Haruna; Mita, Hajime; Furukawa, Yoshihiro; Chikaraishi, Yoshito; Onose, Morihiko; Kabashima, Fumie; Fujishima, Kosuke; Sato, Hajime; Sasaki, Kazunori; Kano, Kuniyuki; Aoki, Junken; Yamazaki, Tomoya; Kimura, Yuki
errShare
errSave
The spatial distribution of soluble organic matter and their relationship to minerals in the asteroid (162173) Ryugu
err2023-05-08
err13
errOAAI
errHashiguchi, Minako; Aoki, Dan; Fukushima, Kazuhiko; Naraoka, Hiroshi; Takano, Yoshinori; Dworkin, Jason P.; Dworkin, Karin E.; Aponte, Jose C.; Elsila, Jamie E.; Eiler, John M.; Furukawa, Yoshihiro; Furusho, Aogu; Glavin, Daniel P.; Graham, Heather V.; Hamase, Kenji; Hertkorn, Norbert; Isa, Junko; Koga, Toshiki; McLain, Hannah L.; Mita, Hajime; Oba, Yasuhiro; Ogawa, Nanako O.; Ohkouchi, Naohiko; Orthous-Daunay, Francois-Regis; Parker, Eric T.; Ruf, Alexander; Sakai, Saburo; Schmitt-Kopplin, Philippe; Sugahara, Haruna; Thissen, Roland; Vuitton, Veronique; Wolters, Cedric; Yoshimura, Toshihiro; Yurimoto, Hisayoshi; Nakamura, Tomoki; Noguchi, Takaaki; Okazaki, Ryuji; Yabuta, Hikaru; Sakamoto, Kanako; Tachibana, Shogo; Yada, Toru; Nishimura, Masahiro; Nakato, Aiko; Miyazaki, Akiko; Yogata, Kasumi; Abe, Masanao; Usui, Tomohiro; Yoshikawa, Makoto; Saiki, Takanao; Tanaka, Satoshi; Terui, Fuyuto; Nakazawa, Satoru; Watanabe, Sei-ichiro; Tsuda, Yuichi
errShare
errSave
Uracil in the carbonaceous asteroid (162173) Ryugu
err2023-03-21
err36
errOAAI
errOba, Yasuhiro; Koga, Toshiki; Takano, Yoshinori O.; Ogawa, Nanako; Ohkouchi, Naohiko; Sasaki, Kazunori; Sato, Hajime P.; Glavin, Daniel P.; Dworkin, Jason; Naraoka, Hiroshi; Tachibana, Shogo; Yurimoto, Hisayoshi; Nakamura, Tomoki; Noguchi, Takaaki; Okazaki, Ryuji; Yabuta, Hikaru; Sakamoto, Kanako; Yada, Toru; Nishimura, Masahiro; Nakato, Aiko; Miyazaki, Akiko; Yogata, Kasumi; Abe, Masanao; Okada, Tatsuaki; Usui, Tomohiro; Yoshikawa, Makoto; Saiki, Takanao; Tanaka, Satoshi; Terui, Fuyuto; Nakazawa, Satoru; Watanabe, Sei-ichiro; Tsuda, Yuichi
errShare
errSave
Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites
err2022-04-26
err77
errOAAI
errOba, Yasuhiro; Takano, Yoshinori; Furukawa, Yoshihiro; Koga, Toshiki; Glavin, Daniel P.; Dworkin, Jason P.; Naraoka, Hiroshi
errShare
errSave
errShare
errSave
INSULIN RESISTANCE UNDERMINES THE ADVANTAGES OF IL28B POLYMORPHISM IN THE PEGYLATED INTERFERON α2B AND RIBAVIRIN TREATMENT FOR CHRONIC HEPATITIS C PATIENTS WITH GENOTYPE 1
err2012-04-01
err1
PREAI
errOgawa, E.; Furusyo, N.; Murata, M.; Kainuma, M.; Toyoda, K.; Taniai, H.; Koga, T.; Eiraku, K.; Mitsumoto, F.; Okada, K.; Etoh, Y.; Hayashi, J.
errShare
errSave
Utility of glycated albumin for the diagnosis of diabetes mellitus in a Japanese population study: results from the Kyushu and Okinawa Population Study (KOPS)
err2011-09-27
err127
errOAAI
errFurusyo, N.; Koga, T.; Ai, M.; Otokozawa, S.; Kohzuma, T.; Ikezaki, H.; Schaefer, E. J.; Hayashi, J.
errShare
errSave