Research keywords (7)：
methane hydrate
, Japan Sea
, trace fossil
, chert
, Earth History
, sedimentology
, geology
Research theme for competitive and other funds (12)：
2012 - 2016 On the study of explosive biodiversification event on pelagic deep-sea bottoms in the Early Phanerozoic Eon
2012 - 2015 Low velocity anomaly of gas hydrate-bearing sediments and in-situ measurements of gas content of deep-sea sediments
2007 - 2010 Integrated study of seafloor methane hydrate and gigantic methane seeps in the eastern margin of Japan Se a
2000 - 2003 Interaction between Geosphere and Biosphere in the Early Paleozoic of the Tethys
1996 - 1998 層状チャート相に見られる生物擾乱構造に基づく2.5億年前の海洋古環境の変動
1995 - 1997 Isotopic anomalies at the Precambrian-Cambrian boundary
1995 - 1996 Secular variation of carbon isotopic compostition of the Phanerozoic shallow marine carbonates.
1993 - 1994 RESEARCH ON PERMIAN AND TRIASSIC BOUNDARY IN PELAGIC SEDIMENTS
1991 - 1992 Structure and isotopic composition of carbonate rocks.
1989 - 1990 Paleoenvironmental Analysis of Siliceous Sediments in Relation to Opening of the Japan Sea
1987 - 1988 Sedimentological Study of the Relation between the Decomposition and Maturation of Organic matter and Formation of Authigenic Minerals during Early Stage of Diagenesis
1987 - 1987 秩父帯内帯三畳〜ジュラ系層状チャートの研究。その岩質の地理的相違について
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Papers (56)：
Overview: Distribution, Occurrence, and Origins of Methane Hydrates around the Japan Islands. Journal of Geography (Chigaku Zasshi). 2024. 133. 2. 63-89
Nakamura, K, Kitayama, D, Ebinuma, T, Kakuwa, Y, Matsumoto, R. Physical and mechanical properties of sea bottom sediments from shallow type gas hydrate province in the off San'in region. Japanese Geotechnical Journal. 2022. 17. 1. 33-45
Kakuwa, Y, Nikitina, O.I. Petrography of Late Cambrian to Middle Ordovician radiolarian chert in Kazakhstan with special reference to the emergence of benthic animals in the pelagic realm. Sedimentology. 2020. 67. 2764-2776
"First" report on the occurrence of ikaite in the sediment cores from the Sea of Japan and its geological significance.
(Annual Meeting of the Geological Society of Japan 2018)
Comparative study on chemical and mineralogical compositions of mud from methane hydrate-bearing core and methane hydrate-free core in the eastern margin of the Sea of Japan.
(International Sedimentological Congress 2018 2018)
Occurrence of shallow gas hydrate in the eastern margin of Japan Sea
(Tottori International Forum on Methane Hydrate 2017)
Significance of trace fossils in radiolarian chert during the Phanerozoic: with special reference to red chert problem
(The 15th Meeting of the International Association of Radiolarists 2017)
Society of Economic Paleontologists and Mineralogists
, International Association of Sedimentologists
, THE GEOLOGICAL SOCIETY OF JAPAN
, THE SEDIMENTOLOGICAL SOCIETY OF JAPAN
