Small size volcano museum.It shows you the mechanism of the eruption.
You can learn about the volcano and the tourism in Sakurajima here.
The film (with English, Chinese or Korean subtitles) on the 200 inch screen introduces Sakurajima.
They sell souvenirs, too. Their original key rings and towels are very good for presents.
The friendly staff will tell you how to enjoy Sakurajima.
Entrance fee: Free
Admission fee: Free