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Kita Yatsuga-take
"Kita-Yatsuga-take (North Yatsuga-take) is a group of stratovolcanoes and lava domes at the NW end of the NNW-SSE-trending Yatsuga-take volcanic massif. The basaltic-to-dacitic Kita Yatsuga-take volcanic group contains the Tateshina, Yoko-dake, Shimagare-yama, Chausu-yama and Futago-mine volcanoes. Tateshina-yama is sometimes known as Suwa Fuji because of its conical profile. A large lava flow forms the Tateshina-kogen plateau south of Tateshina and Yoko-dake volcanoes. A debris avalanche from edifice collapse in 888 AD created Matsubara Lake on the east side of the massif. Yoko-dake lava dome, capped by eight small craters, has been active into the Holocene. The most recent eruption took place about 800 years ago, when ash emission accompanied emplacement of a small lava flow."  -Smithsonian Volcano Archive
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