The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Hajime Obata sits on this spectrum.
This scientist: 185 publications — 57th percentile
57% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 603 publications or more.
The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Hajime Obata sits on this spectrum.
This scientist: 42 D-Index — 44th percentile
44% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 106 D-Index or more.
Hajime Obata is affiliated with the University of Tokyo in Japan and has contributed extensively to the fields of Earth and Planetary Sciences and Environmental Science. Their research emphasizes Oceanography, which forms a significant part of their scholarly work, alongside studies in Health, Toxicology and Mutagenesis, Ecology, Environmental Chemistry, and Atmospheric Science.
Their primary research themes include marine and coastal ecosystems, marine biology and ecology research, mercury impact and mitigation studies, methane hydrates and related phenomena, geochemistry and elemental analysis, heavy metals in the environment, and isotope analysis in ecology.
Obata's research outputs are published in various scientific venues, with frequent publications in Marine Chemistry, Journal of Oceanography, Journal of Geophysical Research Oceans, Geochimica et Cosmochimica Acta, and Scientific Reports. These journals reflect the environmental and marine science context of their work.
Recent publications highlight aspects of biogeochemical cycles, ocean nutrient transport, and trace metal dynamics in the North Pacific. Selected recent papers include:
Collaboration is notable in Obata's work, with frequent coauthors including Jun Nishioka, Kuo Hong Wong, Hiroshi Ogawa, Asami S. Mashio, and Shigenobu Takeda.
Hajime. Obata;Hajime. Karatani;Eiichiro. Nakayama
Reiner Schlitzer;Robert F. Anderson;Elena Masferrer Dodas;Maeve Lohan
Kenneth S. Johnson;Edward Boyle;Kenneth Bruland;Kenneth Coale
G. Cutter;P. Andersson;Lou Codispoti;P. Croot
Jun Nishioka;Hajime Obata;Daisuke Tsumune
Shinsuke Kawagucci;Shinsuke Kawagucci;Hitoshi Chiba;Jun Ichiro Ishibashi;Toshiro Yamanaka
M. Lutfi Firdaus;Ikka Fitriani;Santhy Wyantuti;Yeni W. Hartati
Yoshiki Sohrin;Shun-ichi Iwamoto;Shoji Akiyama;Takeshi Fujita
Edward Mawji;Reiner Schlitzer;Elena Masferrer Dodas;Cyril Abadie
Jong-Mi Lee;Yolanda Echegoyen;Gonzalo Carrasco;Ning Zhao
Atsushi Tsuda;Shigenobu Takeda;Hiroaki Saito;Jun Nishioka
Jun Nishioka;Hajime Obata;Hiroshi Ogawa;Kazuya Ono
Shinsuke Kawagucci;Shinsuke Kawagucci;Yuichiro Ueno;Yuichiro Ueno;Ken Takai;Tomohiro Toki
Shigenobu Takeda;Hajime Obata
Christopher R. German;Karen L. Casciotti;Jean-Claude Dutay;Lars-Eric Heimburger
Koji Suzuki;Hongbin Liu;Toshiro Saino;Hajime Obata
Y. Sohrin;S. Iwamoto;M. Matsui;H. Obata
Sohiko Kameyama;Hiroshi Tanimoto;Satoshi Inomata;Urumu Tsunogai
Toshitaka Gamo;Eiichiro Nakayama;Kiminori Shitashima;Kenji Isshiki
Takuya Matsumoto;Teruyuki Maruoka;Gen Shimoda;Hajime Obata
Kei Okamura;Hideshi Kimoto;Kazuyoshi Saeki;Junichiro Ishibashi
Jun Nishioka;Hajime Obata
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