Heisaura: a 5-km long stretch of sand on the southern tip of Boso Peninsula, facing the Pacific; great for all kinds of beach-goers, including families; famous breaks that are popular with surfers, kite-surfers. Can be windy.
Hojo: A 2-km beach on the calm, quiet waters of Mirror Bay, facing Mt. Fuji. Very popular in summertime. Right near the train station, convenience stores, etc.; 300 free parking spots; 2 showers; changing rooms; toilets.
Windsurfing all year.
Good for families.
Hasama Beach: clear, shallow waters; rocks to play on; pool nearby at Kyukeimura for children; parking (for a fee), two changing sheds, two toilets; day spa at Kyukeimura.
See Okinoshima page for more details.
Mera Beach: Suitable for walking the cove-shaped beach and enjoying the views, NOT for swimming; unpredictable swells and dangerous reef.