A must-visit place for when you go to Sado Island. The main activity is a boat ride -- the boat's floor has a transparent portion, allowing you to look down into the ocean and observe the coral and schools of fish. The scenery and breeze is amazing, and seagulls, who are non-hostile towards people in general, are heavily present, which is a delight as far as birdwatching goes. Also, note that the walk from the building, down to the boat port, is not short -- it's a long, scenic, downhill walk, with plenty of scenic detours worth taking, including lots of places from which you can look over the rocky cliffs (see images (the character is Torisumi Horou, a crested ibis)). The panoramic shot, for example, is taken from a bridge located by a lighthouse that you pass by on the way down to the boat port. Crossing the bridge leads to another viewing area, that also has vending machines available. Ultimately, most people spend around an hour here, but if you are keen on taking lots of photos, then you can spend as much as 2+ hours here, so do plan accordingly.
The boat ride is amazing. The fee for the boat ride and entry is around 1100 yen per person. You can cover this area in 1 hour. Free wifi is available.
The view were scenic, the boat ride was not very fantastic as the sea was very choppy when we visit.
Remember to check the sea conditions before deciding to take the boat ride, otherwise is a waste of money
Some of the best scenery you'll get in Sado. The boat will take you around the rocks to see the bay from different angles, and its see-through bottom will let you view the creatures living in the ocean. All this for about 10 USD.