My personal favorite other than Okinawa is Shirahama Beach in Shimoda. Gorgeous views, amenities like convenience stores close by, and lots to do in the surrounding area (especially for history buffs) which makes it a great weekend trip destination - or longer!
As an island country, Japan is surrounded by the ocean and blessed with stunning beaches and seascapes. When summer rolls around, families, groups of friends and couples flock to the beach to take a dip in the water and escape the heat.
Meanwhile, Tokyo is not far from gorgeous beaches where you can go for a swim or enjoy a day in the sand. Kanagawa Prefecture and Chiba Prefecture both contain stunning coast and beaches open to the public that can be accessed from the city center in an hour or less.
Recommended Beaches Near Tokyo
1. Yuigahama Beach, Kanagawa
Located in Kamakura, Yuigahama Beach is a great choice for beachgoers wanting to experience something different in one of Japan's ancient capitals. It is a close walk to train stations and is extremely convenient for those using public transportation. In addition to enjoying the water, numerous cafes and restaurants are set up in temporary stalls and buildings right by the beach for visitors to enjoy.
Address: Kanagawa, Kamakura, Yuigahama Kaigan
Access: about a 5-minute walk from Enoshima Hase and Yuigahama stations
Official Website: https://yuigahama.sos.gr.jp/en/
Season: July 1 - August 31, 2019
2. Zushi Beach, Kanagawa
>One of the most popular spots for swimming is Zushi Beach in Kanagawa Prefecture, close to Kamakura. At Zushi Beach, beachgoers can enjoy around 600 meters of beach and shallow water with minimal waves. It is ideal for light swimming with friends or family and a day of leisure on the beach. At the end of the day, be sure to catch the gorgeous sunset.
Address: Kanagawa, Zushi, Shinjuku 1
Access: about a 10 to 15-minute walk from Keikyu Shin Zushi Station or JR Zushi Station.
3. Okinoshima Swimming Area, Chiba Prefecture
>Okinoshima in southern Chiba is a deserted island with a rustic coastal environment, allowing visitors to be surrounded by nature. Swimmers here can enjoy snorkeling in the clear waters, beachcombing, and exploring surrounding caves and even a Shinto shrine. The beach is slightly further from Tokyo than other areas, so visitors will want to spend at least a day here exploring. A car is recommended for getting to the beach.
Address: Chiba, Tateyama, Fujimi
Access: about a 30-minute walk from the JMSDF Tateyama Air Base bus stop
Season: July to August.
If you would like to know more recommended beaches in Japan you can visit this site as your reference.