I died yesterday, so next morning:
Besides the beach there was the island of Enoshima which is within walking distance from the shore (connected by a bridge).
There are some shrines, a garden, and souvenir shops around the area that were fun to go to.
What I found interesting was that in the back roads, where all the residents live, there are some restaurants.
There was even one place that was basically some seats in front of a garage where they were serving fresh sashimi.
It would have been nice to eat somewhere like that but the costs…