Izu ?shima is in Japan. It is the largest of the seven Izu Islands. ?shima is famous for Mt. Mihara, an active volcano that last erupted in 1986. Cities: Okata is one of the main ports on the island for the ferries and jetfoils from Tokyo, Atami, and Niijima. Motomachi is the main town on the island. The post office is next to the ferry port and their international ATM is open 7 days a week from 9 am to 6 pm on weekdays, and 9 am to 2 pm on weekends. Habuminato is a rustic fishing village on the south side of the island. Its historic Row of Houses and amazing views attract many visitors.