From aboard the Marine Viewer Seto semi-submerged sightseeing boats, passengers can see the Oshima Strait coral reef that spreads out over the southern part of Amami Oshima Island and tropical fish right before their eyes from the underwater observation rooms. Depending on the weather and the sea conditions each day, there are three courses to choose from, each about 35 minutes round trip (currently, two of the courses have suspended operations). There are two types of ships, red and blue, designed after whales, and from the deck passengers can look out at the blue ocean scenery. From the submerged observation room, passengers can take a peek into the colorful and mysterious world under the sea. Take a ride on the Marine Viewer Seto and have a taste of the extraordinary.

*Depending on the weather and the conditions of the sea, departure times may change.
*The number of passengers for each boat is fixed. Once that number is reached, reception will finish. Calling ahead of time to reserve a spot is recommended.