Seaside destinations in Japan for nature and scenery? [closed]

I'm seeking seaside resort towns for a nature getaway or retreat, where I can enjoy views of water too. I tried https://www.japan.travel/en/us/ and Need seaside town suggestion please - Japan Forum - TripAdvisor

We want to find a seaside town/city to go to next. We love rocky beaches, nature hikes, history, the smell of ocean air, the scenery of water, and we want to experience Japan in a smaller town way. So far, this forum has suggested Miyajima as a good seaside destination, but based on our itinerary, it seems like we keep going west of Tokyo and we will have to come all the way back to get on the plane. Any other suggestion for seaside town or rerouting of our itinerary? Our return flight is in the afternoon.

but these criteria must be fulfilled.

1. No dangerous animals or uncivilized boondocks. No Caniformia or snakes.

2. I won't drive, and must rely on public transport and walking less than 5 km in total.

3. No shrines, temples or any religious edifice.

4. OPTIONAL: I fancy water bodies, the more the better.