The Best Spa in Japan

Enoshima Island Spa is located just outside Tokyo (direct ride on the Romance Car from Shinjuku Station..60 to 70 minutes). This ancient healing spot is just off the Shonan Coast and you take a 10 minute walk over the bridge to the island itself. The spa entrance fee of 2,650 yen gives you access to two floors of lovely heated pools and a hot spring area. The pools are open year round and the view of the ocean and Mt. Fuji on a clear winter day, just cannot be beat. They also have aromatherapy massage and shiatsu massage for massage enthusiasts. Take a look here for more details.
http://www.jarman-international.com/partners/enoshima-island-spa/#.UjfesbRpvZs

Children six and above can enjoy the spa every day except Sunday and there is a very strict no-tattoo and no-photography policy in place.