ニュース

A new research article ： Published 8 April 2026
Progressive development of the Paleocene to early Miocene Shimanto accretionary complex in eastern Shikoku, Southwest Japan: response to magmatic arc evolution along the East Asian continental margin
Hidetoshi Hara, Satoshi Tonai & Hinako Matsumoto

A new research article ： Published 1 April 2026
Validating tropospheric NO2 column density from GEMS version 3.0 and Tropospheric Chemistry Reanalysis version 2 from background to urban conditions over Japan: with a focus on diurnal variations
Phuc Thi Minh Ha, Yugo Kanaya, Takashi Sekiya, Hisahiro Takashima, Kengo Sudo, Yongjoo Choi, Limseok Chang, Hanlim Lee, Hyunkee Hong & Jhoon Kim

This article has been published as a part of the SPEPS collection
“Biogeochemical Studies on Atmosphere, Ocean, and their Interaction in
the western North Pacific region”

A new methodology article ： Published 30 March 2026
Estimation of dry bulk density of marine core sediments using an XRF core scanner
Kaz Mitake, Arisa Seki, Ryuji Tada, Tomohisa Irino & Masafumi Murayama

This article has been published as a part of the SPEPS collection
“Past variability of Asian monsoon and its influence on surrounding regions on various timescales”

A new review article ： Published 27 March 2026
Review on evaluations of anisotropic hydraulic properties in the fractured rock mass
Hinako Hosono, Daisuke Asahina, Makoto Otsubo, Yuichi Kitagawa & Norio Matsumoto

A new research article ： Published 26 March 2026
New screening method for well-preserved brachiopod shells and shell portions for paleoenvironmental analysis: Raman spectroscopy
Kazuma Oikawa, Hideko Takayanagi, Hiroshi Fujioka, Mamoru Takizawa, Miki Arakane, Yui Kouketsu, Thasinee Charoentitirat, Hidetoshi Hara, Koshi Yamamoto, Osamu Abe, Ryuji Asami, Komei Yamagishi, Hiroto Oda & Yasufumi Iryu

This article has been published as a part of the SPEPS collection
“Carbonates: their precipitation, sedimentation, reef/platform formation, and diagenesis”

A new research article ： Published 23 March 2026
Comparisons of strontium isotope ratios in the water and otoliths suggest narrow habitat ranges of freshwater three-spined sticklebacks in Otsuchi, Japan
Konomi Uji, Takanori Nakano, Ki-Cheol Shin, Seiichi Mori, Manabu Kume, Shotaro Nishida & Ichiro Tayasu
This article has been published as a part of the SPEPS collection
“Earth, Isotopes and Organics”

A new research article ： Published 23 March 2026
Structural Evolution of the Eastern Nankai Trough accretionary prism, Central Japan—Subduction of Trough-Parallel Seamount Chains
Philomene Vanessa Eyang Ondo Ep Ella Ndong, Kohsaku Arai, Ayanori Misawa, Narumi Takahashi, Yuka Yokoyama, Asahiko Taira & Izumi Sakamoto

A new research article ： Published 11 March 2026
Discrepancies between feeding ecology and trophic position based on nitrogen isotopic composition in endosymbiont-bearing benthic foraminifers
Ayumi Maeda, Yuichi I. Naito, Masashi Tsuchiya, Yoshito Chikaraishi, Kazuhiko Fujita, Naohiko Ohkouchi & Hodaka Kawahata

This article has been published as a part of the SPEPS collection
“Earth, Isotopes and Organics”

A new research article ： Published 9 March 2026
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
Satoshi Furota, Naoto F. Ishikawa, Nanako O. Ogawa, Toshio Furota & Naohiko Ohkouchi
This article has been published as a part of the SPEPS collection
“Earth, Isotopes and Organics”