If you have the time and the inclination for a beach picnic, it's worth taking the 25-minute high-speed ferry (round-trip ¥2,340) from the pier. There are nine departures daily between 7:30 and 5:20 from both Atami and Ito. You can easily walk around the island, which is only 4 km (2½ miles) in circumference, in less than two hours. Use of the Picnic Garden (open daily 10–3) is free.
Atami, Shizuoka-ken, Japan