Tiatia volcano (Chacha-dake in Japanese) is one of the most impressive volcanoes in the Kuriles. It is a symmetrical stratovolcano located on the NE end of Kunashir Island 70 km from Hokkiado, Japan. The volcano has a 2.1 x 2.4 km wide caldera and a young summit central cone within the caldera, rising 400 m above the floor and containing a 400 x 250 m wide summit crater.
Its last confirmed eruption was in 1981.