Caldera Volcano Research Group

Caldera Volcano Research Group explores large-scale eruptions which produce voluminous ignimbrite and collapse caldera. Our researches target the evolution of magma plumbing system toward catastrophic eruption, sequence of caldera-forming eruption, and the impact of eruption on the environments, making full use of the geological, petrological and geophysical methods. These researches are carried in collaboration with Volcanic Activity Research Group and Magmatic Activity Research Group.



Yoshihiro Ishizuka (Leader, Group)
Shinji Takarada (Chief Senior Researcher)


Isoji Miyagi (Senior Researcher)

My research interest is in any of those related to magmatic water. In recent years particular emphasis has been placed on understanding the amount of magmatic water. Please check out my web page at:


Keiko Matsumoto (Senior Researcher)
Tatsuya Konoo (Research Assistant)
Misato Osada (Research Assistant)
Hideo Hoshizumi (Technical staff)
Genji Saito (Technical staff)

Magma ascent, degassing, eruption processes on active volcanoes and present condition and evolution of their magma plumbing systems are investigated based on petrological studies of volcanic rocks and melt inclusion analyses.

Emi Kariya (Technical staff)
Joel Bandibas (Technical staff)
Ikuko Yamada (Technical staff)
Yuhki Kohno (Technical staff)
Shuhou Maitani (Technical staff)
Fumihiko Ikegami (Technical staff)