Arrive at Kochi Ryoma Airport in the morning, then catch a ride to the Tatsukushi Coast. Find a lunch spot at your leisure. In the afternoon, head to the Tatsukushi Visitor Center Uminowa and get situated by participating in one of the tours they offer. The name Uminowa emphasizes the notion of connection between humans and the natural world, especially the sea. The activities available at the visitor center will stimulate your interest in the region's natural history, with tours taking you out to the tide pools along the coast or to explore the rocks that are the direct consequences of earthquakes, tsunamis, and other phenomena.

Once these activities are wrapped up, head to your lodging at Ashizuri Onsen, a hot spring resort said to be founded by the Buddhist monk Kukai around 1,200 years ago. Steep yourself in the history and healing waters of the onsen after a day spent on the coast.

In the morning, travel back to the Tatsukushi Coast for a boat tour on the bay. You'll learn about coral conservation efforts from the captain while admiring the spectacular underwater scenery visible from the glass bottom of the boat. After docking, the tour will take you to explore the strangely shaped rocks along the Minokoshi Coast. These special formations will delight and inspire you after your adventure on the water.

Take a moment to grab lunch in the vicinity, then move to the Ashizuri Aquarium. There are plenty of sights and activities to fill your entire afternoon, with two floors, multiple exhibition areas, an observation deck, a shop, and more. Next, stop by the Seashell Gallery nearby, which has more than 50,000 shells on display. After looking at a range of shells at the Shell Gallery, you return to Kochi Ryoma Airport and board your onward flight.