Research Areas
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Natural Science / Biogeosciences
Graduating School
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Yamagata University, Faculty of Science
1986.03, Graduated
Graduate School
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Tohoku University, Graduate School, Division of Natural Science
Doctor's Course, 1992.03, Completed
Degree
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Ph.D, Tohoku University, 1992.03
External Career
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, Lecturer, 1996.11 - 2000.01
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, Lecturer, 2000.02 - 2010.03
Papers
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Research of an outcrop of the lower margin of the embankment at the head of the Aizome River, Atami City, Shizuoka Prefecture, central Japan., Geoscience reports of Shizuoka University, 49(0) 61-72, 2022.07
Kitamura Akihisa, Yamashita Yuki, Yanaga Makoto, Motoyama Isao, Nakanishi Toshimichi, Mori Hideki
Multiple Authorship (Only Japanese)
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Unconsolidated mudstone gravels in embankment at the site of a landslide in the Izusan area, Atami City, Shizuoka Prefecture, Japan, The Quaternary Research (Daiyonki-Kenkyu), 61(4) 143-155, 2022
Kitamura Akihisa, Kameo Koji, Motoyama Isao, Moriya Kazuyoshi, Saito Takeshi, Watanabe Mahito, Mori Hideki
Multiple Authorship (Only Japanese)
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Variation in the eastern North Pacific subtropical gyre (California Current system) during the Middle to Late Miocene as inferred from radiolarian assemblages, MARINE MICROPALEONTOLOGY, 155 , 2020.03
Kamikuri Shin-ichi, Motoyama Isao
Multiple Authorship (Only Japanese)
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Radiolarians and geologic age of Neogene stratiform manganese deposits in the Fukaura District, Aomori Prefecture, Japan, The Journal of the Geological Society of Japan, 125(4) 297-305, 2019.04
Sakai Shiono, Ito Takashi, Kamikuri Shin-ichi, Motoyama Isao, Komuro Kosei
Multiple Authorship (Only Japanese)
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A review of Neogene radiolarian biostratigraphy in Japan during the last two decades, BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN, 70(1) 125-136, 2019.03
Motoyama Isao
Single Author
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Special issue on micropaleontological study: Scientific results from the joint meeting of Micropaleontological Reference Center Meeting 2016 and 13th Radiolarian Symposium, BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN, 70(1) 1-4, 2019.03
Motoyama Isao, Itaki Takuya
Multiple Authorship (Only Japanese)
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Radiolarians from dredged sedimentary rocks from off southeast Boso Peninsula, JAMSTEC Report of Research and Development, 27(0) 77-86, 2018.09
Kawamura Kiichiro, Motoyama Isao, Yoshimoto Keita
Multiple Authorship (Only Japanese)
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Radiolarian and diatom biostratigraphy of the Upper Miocene Yobito Formation near Lake Notoro, Hokkaido, Japan, The Journal of the Geological Society of Japan, 124(7) 517-532, 2018.07
Motoyama Isao, Maruyama Toshiaki, Igarashi Mio, Eguchi Mizuki, Suto Megumi, Suzuki Masafumi
Multiple Authorship (Only Japanese)
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Pleistocene deep-sea ostracods from the Oki Ridge, Sea of Japan (IODP Site U1426) and condition of the intermediate water, Quaternary Research, 88(3) 430-445, 2017.11
Yamaguchi, T., Kuroki, K., Yamada, K., Itaki, T., Niino, K. and Motoyama, I.
Multiple Authorship (Including Foreigners)
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Radiolarian biostratigraphy from Middle Miocene to Late Pleistocene in the Japan Sea, Paleontological Research, 21(4) 397-421, 2017.10
Kamikuri, S., Itaki, T., Motoyama, I. and Matsuzaki, K. M.
Multiple Authorship (Including Foreigners)
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Cenozoic biostratigrphy, chronostratigraphy and paleoceanography in the Boso Peninsula and Bandai Volcano in the Aizu region, East Japan, Science Reports of the Niigata University (Geology), (32) 1-27, 2017.10
Motoyama, I., Itaki, T., Kamikuri, S., Taketani, Y. and Okada, M.
Multiple Authorship (Including Foreigners)
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Neogene biosiliceous sedimentary sequence and radiolarian biostratigraphy in the Tainai area, Niigata Prefecture, Science Reports of the Niigata University (Geology), (32) 91-102, 2017.10
Motoyama, I., Kurihara, T. and Itaki, T.
Multiple Authorship (Including Foreigners)
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Radiolarian assemblages in surface sediments of the Japan Sea, Paleontological Research, 20(3) 176-206, 2016.07
Motoyama, I., Yamada, Y., Hoshiba, M., Itaki, T.
Multiple Authorship (Including Foreigners)
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Formation of pockmarks and submarine canyons associated with dissociation of gas hydrates on the Joetsu Knoll, eastern margin of the Sea of Japan, Journal of Asian Earth Sciences, 90 228-242, 2014.08
Nakajima, T., Kakuwa, Y., Yasudomi, Y., Itaki, T., Motoyama, I., Tomiyama, T., Machiyama, H., Katayama, H., Okitsu, O., Morita, S., Tanahashi, M., Matsumoto, R.
Multiple Authorship (Including Foreigners)
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Environmental fluctuations in the northwestern Pacific Ocean during the last interglacial period: evidence from radiolarian assemblages, Marine Micropaleontology, 108 1-12, 2014
共著
Multiple Authorship (Including Foreigners)
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Structure and composition of the plate-boundary slip zone for the 2011 Tohoku-oki earthquake, Science, 342 1208-1211, 2013.12
共著
Multiple Authorship (Including Foreigners)
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Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241, Acta Paleontologica Polonica, 54 713-742, 2009.12
Kamikuri, S., Motoyama, I., Nishi, H. and Iwai, M.
Multiple Authorship (Including Foreigners)
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Diatom biomarkers during the Eocene/Oligocene transition in the Il'pinskii Peninsula, Kamchatka, Russia, Palaeogeography, Palaeoclimatology, Palaeoecology, 264(1-2) 1-10, 2008.07
Shiine, H., Suzuki, N., Motoyama, I., Hasegawa, S., Gladenkov, A.Y., Gladenkov, Yu.B., Ogasawara, K.
Multiple Authorship (Including Foreigners)
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Effects of late Neogene climatic cooling on North Pacific radiolarian assemblages and oceanographic conditions, Palaeogeography, Palaeoclimatology, Palaeoecology, 249(3-4) 370-392, 2007.06
Kamikuri, S., Nishi, H., Motoyama, I.
Multiple Authorship (Including Foreigners)
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Orbital- and millennial-scale changes of radiolarian assemblages during the last 220 kyrs in the Japan Sea, Palaeogeography, Palaeoclimatology, Palaeoecology, 247(1-2) 115-130, 2007.04
Itaki, T., Komatsu, N., Motoyama, I.
Multiple Authorship (Including Foreigners)
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Foraminiferal oxygen and carbon isotopes during the last 34 kyr off northern Japan, northwestern Pacific, Marine Micropaleontology, 61(4) 196-208, 2006.12
Hoshiba, M., Ahagon, N., Ohkushi, K., Uchida, M., Motoyama, I., Nishimura, A.
Multiple Authorship (Including Foreigners)
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Middle Miocene to Pleistocene radiolarian biostratigraphy in the Northwest Pacific, Ocean Drilling Program Leg 186., The Island Arc, 13(1) 191-226, 2004.03
Kamikuri, S., Nishi, H., Motoyama, I., Saito, S.
Multiple Authorship (Including Foreigners)
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A Middle Miocene to Pleistocene magnetobiostratigraphy of ODP Sites 1150 and 1151, northwest Pacific: sedimentation rate and updated regional geologic time scale, The Island Arc, 13(1) 289-305, 2004.03
Motoyama, I., Niitsuma, N., Maruyama, T., Hayashi, H., Kamikuri, S., Shiono, M., Kanamatsu, T., Morishita, C., Aoki, K., Hagino, K., Nishi, H., Oda, M.
Multiple Authorship (Including Foreigners)
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Abrupt ventilation changes in the Japan Sea over the last 30 ky: evidence from deep-dwelling radiolarians, Palaeogeography, Palaeoclimatology, Palaeoecology, 308(3-4) 263-278, 2004
Itaki, T., Ikehara, K., Motoyama, I., Hasegawa, S.
Multiple Authorship (Including Foreigners)
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Biostratigraphic age models and sedimentation rates along the southwest African margin, Proceedings of the Ocean Drilling Program, Initial Reports, 175 543-546, 1998.11
Giraudeau, J., Christensen, B. A., Hermelin, O., Lange, C. B., Motoyama, I., and Shipboard Scientific Party
Multiple Authorship (Including Foreigners)
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Origin and evolution of Cycladophora davisiana Ehrenberg (Radiolaria) in DSDP Site 192, Northwest Pacific, Marine Micropaleontology, 30 45-63, 1997.03
Isao Motoyama
Single Author
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Late Neogene radiolarian biostratigraphy in the subarctic Northwest Pacific, Micropaleontology, 42(3) 221-262, 1996.09
Isao Motoyama
Single Author
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Mid-Cretaceous faunal turnover of intermediate-water benthic foraminifera in the northwestern Pacific Ocean margin., Marine Micropaleontology, 23 13-49, 1993.11
Kaiho, K., Fujiwara, O. and Motoyama, I.
Multiple Authorship (Including Foreigners)
Review Papers
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Integrated stratigraphy of the Middle Miocene marine sequence in the Boso Peninsula, central Japan: a review., Bulletin of the Geological Survey of Japan, 50(3) 225-243, 1999.03
Takahashi, M., Mita, I., Watanabe, M. and Motoyama, I.
Grant-in-Aid for Scientific Research
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Grant-in-Aid for Scientific Research(C),2022.04 - 2026.03
Joint Research activities
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Ocean Drilling Program Leg 175, 1997.08 - 1997.10, International Collaboration
Presentations
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Proceedings of the General Meeting of the Association of Japanese Geographers, Domestic presentation, 2023, Slope disasters in Iide town, Yamagata Prefecture, due to torrential rain in August 2022, Poster presentation
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Annual Meeting of the Geological Society of Japan, Domestic presentation, 2019, Preservation and exhibition of rock specimens by students : An example of "Chikyu Museum", Yamagata University, Oral presentation (general)
Academic Activity
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日本地質学会, 2000.04 - 2004.08
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日本古生物学会, 2001.09 - 2003.08
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日本古生物学会, 2003.09 - 2006.05
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日本古生物学会, 2006.06 - 2007.08
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日本地質学会, 2007.04 - 2010.03
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日本地球惑星科学連合, 2007.09 -
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日本古生物学会, 2007.10 - 2009.08
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日本地質学会, 2010.04 -
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日本地質学会, 2020.04 -
Media Coverage
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NHK高校講座「地学」番組講師,2009.04