24 hours on liner ship from Takeshiba Pier to Chichijima island, Futami Port. 20 minutes from the port by boat.
Spend a day at Minamijima Island, located off the southwest coast of Chichijima Island. Its submerge karst terrain make for a beautiful dive site, and the Ogi-ike lagoon is equally mesmerizing. The surrounding area is rocky, so you need to be accompanied by a certified tour guide and a sea kayak is necessary to get here.