Otsuchi

Surf, swim, hike, walk around the town and talk to the locals.

Also, although there are no natural hot springs in the area, there is a spa behind Mast, which is fantastic. There are six baths and two saunas. Three of the baths are outside, which are wonderful after a long day in the winter. Plus, they have a tank full of fish that you can stick your feet in for relaxation.