*Kaori Aoki1,2, Makoto Kobayashi3, Masanori Murata4, Takayuki Takahashi5, Fumikatsu NISHIZAWA6, Yosuke Miyairi7, Yusuke Yokoyama7, Takehiko Suzuki2
(1. Department of Life Science and Technology, Faculty of Engineering, Hokkai-Gakuen University, 2. Tokyo Metropolitan University, 3. Fujisan World Heritage Centre, 4. Ministry of Education, Culture, Sports, Science and Technology, 5. Tohoku University, 6. Kanagawa Prefectural Museum of Natural History, 7. University of Tokyo)
Keywords:tephrochronology, Izu Islands, Niijima volcano, Kozushima volcano, Omurodashi submarine volcano