About Koizumi Itaru
About Ocean Research Department, Visiting Researcher in 2000, and IODP Domestic Science Planning Committee, Chairman in 2003-2010 (Emeritus Professor of Hokkaido University)
About Yamamoto Hirofumi
About Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
About JAMSTEC Report of Research and Development
About North Pacific Ocean
About Diatomaceous Earth
About abyssal sediment
About Oligocene Epoch
About Neogene Period
About Pleistocene Epoch
About siliceous sediment
About sedimentary environment
About facies analysis
About Bacillariophyta
About algae
About Cryptogamae
About Bacillariophyceae
About Neogene North Pacific diatomite
About Synchronous geological events
About Silica switch
About Carbonate Crash
About Sedimentary environments,facies
About 北太平洋
About 周辺
About 珪藻土
About 珪藻
About 質
About 堆積物