J-GLOBAL         Last updated: Oct 2, 2019 at 15:16
Hirosaki University
Graduate School of Science and Technology
Job title
Research Associate
Twitter ID

Research Areas


Published Papers

Reishi Takashima, Hiroshi Nishi, Toshiro Yamanaka, Yuji Orihashi, Yasuyuki Tsujino, Xavier Quidelleur, Keiichi Hayashi, Ken Sawada, Hideto Nakamura, Takuto Ando
Newsletters on Stratigraphy   52 341-376   Jun 2019
© 2019 Gebrüder Borntraeger, Stuttgart, Germany. The Yezo Group, exposed in Hokkaido, northern Japan, is one of the few strata that recorded Cretaceous paleo-oceanographic changes in the Pacific Ocean. Although the group yields abundant marine mac...
Ignacio Bernardi Mauro, Walter Bertotto Gustavo, Daniel Ponce Alexis, Orihashi Yuji, Sumino Hirochika
ANDEAN GEOLOGY   46(2) 279-299   May 2019   [Refereed]
Jun Arimoto, Reishi Takashima, Hiroshi Nishi, Toshiro Yamanaka, Toshiro Yamanaka, Yuji Orihashi, Yuji Orihashi, Shota Jo, Shota Jo, Koshi Yamamoto, Keita Umetsu, Keita Umetsu
Cretaceous Research   92 264-278   Dec 2018
© 2018 Elsevier Ltd Determining detailed geologic ages for pre-Quaternary non-marine and shallow marine siliciclastic successions has generally been difficult due to the rare occurrence of age-diagnostic fossils. In this study, we present the firs...
Pablo Grosse, Yuji Orihashi, Yuji Orihashi, Silvina R. Guzmán, Silvina R. Guzmán, Hirochika Sumino, Hirochika Sumino, Keisuke Nagao, Keisuke Nagao
Bulletin of Volcanology   80    May 2018
© 2018, Springer-Verlag GmbH Germany, part of Springer Nature. Volcanoes can stay dormant for much longer than 10 ka and hence many Quaternary volcanoes lacking Holocene activity have the potential to become active. Reconstructing the eruptive his...
Hayato Ueda, Sho Kimura, Takahiro Saito, Yumi Takano, Natsumi Iizuka, Yuji Orihashi, Yuji Orihashi
Island Arc      Jan 2018
© 2018 John Wiley & Sons Australia, Ltd Identifying and examining geological processes that have occurred in sediment-starved trenches of ancient non-accretionary subduction zones exposed on land are still challenging, because such style of subd...
Shinjoe Hironao, Furukawa Kuniyuki, Orihashi Yuji, Hokanishi Natsumi, Wada Yutaka
The Journal of the Geological Society of Japan   124(7) 533-538   2018
<p>The Hachiya Formation of the Kani Group in southern Gifu Prefecture is the oldest sediment in the eastern part of the Setouchi Geologic Province, and is composed mainly of volcaniclastic rocks deposited in a nonmarine basin. We present the resu...
Geological Magazine   156 1-14   Nov 2017
Copyright © Cambridge University Press 2017 The upper Palaeozoic succession (Pyeongan Supergroup) in central eastern Korea is well correlated with the equivalent successions distributed in North China, suggestive of the Korean upper Palaeozoic bei...
Tiago Jalowitzki, Fernanda Gervasoni, Rommulo V. Conceição, Yuji Orihashi, Gustavo W. Bertotto, Hirochika Sumino, Manuel E. Schilling, Keisuke Nagao, Diego Morata, Diego Morata, Paul Sylvester
Lithos   292-293 179-197   Nov 2017
© 2017 Elsevier B.V. In subduction zones, ultramafic xenoliths hosted in alkaline basalts can yield significant information about the role of potential slab-derived components in the subcontinental lithospheric mantle (SCLM). Chemical and isotopic...
T. Medialdea, L. Somoza, F. J. González, J. T. Vázquez, C. de Ignacio, H. Sumino, O. Sánchez-Guillamón, Y. Orihashi, R. León, D. Palomino
Geochemistry, Geophysics, Geosystems   18 3138-3164   Aug 2017
© 2017. American Geophysical Union. All Rights Reserved. New seismic profiles, bathymetric data, and sediment-rock sampling document for the first time the discovery of hydrothermal vent complexes and volcanic cones at 4800–5200 m depth related to...
Kentaro Hattori, Shuhei Sakata, Michitaka Tanaka, Yuji Orihashi, Takafumi Hirata, Takafumi Hirata
Journal of Analytical Atomic Spectrometry   32 88-95   Jan 2017
© 2017 The Royal Society of Chemistry. Precise zircon U-Pb age determinations have been made on Plešovice zircon using laser ablation-multiple ion counting-inductively coupled plasma-mass spectrometry (LA-MIC-ICP-MS). To achieve high precision and...


新正 裕尚, 折橋 裕二, 外西 奈津美
東京経済大学人文自然科学論集   (138) 91-98   2016
Whole rock major and trace element compositions analyzed by XRF are reportedfor two andesites and three rhyolitic welded tuffs including Shiraiwasanpyroclastic flow deposit from Ohno volcanic rocks, one of the member of theSetouchi Volcanic Rocks ...
新正 裕尚, 折橋 裕二, 角井 朝昭
東京経済大学人文自然科学論集   (139) 21-31   2016
In Sanuki plain of NE Shikoku island, many small volcanic bodies belonging to Setouchi Volcanic Rocks are distributed. We report new 24 whole rock compositions of felsic members of the Setouchi Volcanic Rocks analyzed using XRF.Some of the samples...
Hiroyuki Okawa, Masanori Shimojo, Yuji Orihashi, Koshi Yamamoto, Takafumi Hirata, Shin ichi Sano, Yasuo Ishizaki, Yoshikazu Kouchi, Shuichi Yanai, Shigeru Otoh
Memoir of the Fukui Prefectural Dinosaur Museum   (12) 35-78   Jan 2013
U-Pb analyses of more than 1,000 single detrital zircons from 16 formations of the Silurian-Lower Cretaceous continuous succession of the South Kitakami Belt (SKB), Northeast Japan, provide a detrital zircon reference for the complex continental-m...
新正 裕尚, 角井 朝昭, 折橋 裕二, 下田 玄
The journal of humanities and natural sciences   (124) 31-40   Nov 2007
New whole rock major and trace element compositions analyzed by XRF are reported for 22 samples from Kumano Acidic Rocks in southeastern Kii Peninsula. Characteristics of major element compositions are described in brief.
Yuji Orihashi, Ryo Anma, Naomi Harada, Natsue Abe
Geochemical Journal   47 93-95   Jan 2013
Ishihara Shunso, Orihashi Yuji
Rock-forming zircon was separated from so-called Triassic granitoids at Nui Phao in the northern Viet Nam, and the contained zircons were dated by LA-ICPMS U-Pb method, as the earliest Triassic of ca. 250 Ma. These new results are suggestive to id...
Tamaki Ura, Kensaku Tamaki, Akira Asada, Kei Okamura, Kenji Nagahashi, Takashi Sakamaki, Toshitaka Gamo, Kyoko Okino, Takashi Obara, Kenji Nakane, Tadamasa Obata, Yuji Ooyabu, Norio Yamaoka, Yuji Orihashi, Jun Han, Hisashi Koyama, Harumi Sugimatsu
OCEANS 2007 - Europe      Nov 2007
the Autonomous Underwater Vehicle "r2D4", constructed in 2003, is a cruising type AUV weighing 1,600 kgf with a length of 4.4 m. It is fitted with a side scanning sonar, an interferometry sonar, a CTDO, and an in-site chemical analyzer "GAMOS" for...
A. Motoki, Y. Orihashi, J. A. Naranjo, D. Hirata, P. Skvarca, R. Anma
Revista Geologica de Chile   33    Jul 2006
谷 健一郎, 折橋 裕二, 中田 節也
Earthquake Research Institute, University of Tokyo technical research report   (8) 26-36   2002

Conference Activities & Talks

Toyama Chiaki, Iwamori Hikaru, Sumino Hirochika, Shinjoe Hironao, Orihashi Yuji
Abstracts of Annual Meeting of the Geochemical Society of Japan   2018   
Hirata Takafumi, Ohara Seiya, Makino Yoshiki, Orihashi Yuji, Itoh Shoichi, Kagi Hiroyuki
Abstracts of Annual Meeting of the Geochemical Society of Japan   2017   
Shinjoe Hironao, Orihashi Yuji, Sumii Tomoaki
Shinjoe Hironao, Orihashi Yuji, Sumii Tomoaki
Annual Meeting of the Geological Society of Japan   2017   
Miyake Yuko, Kudymov A V, Didenko A N, Morita Sachiko, Nagata Mitsuhiro, Koutsi Yoshikazu, Otoh Shigeru, Aoyama Masashi, Orihashi Yuji, Yamamoto Koshi, Zyabrev S V
Annual Meeting of the Geological Society of Japan   2017