On the first day, after a 50-minute ferry ride from Sendai Port (Kagoshima) to Sato Port on Koshikijima Island, enjoy free time to explore this mystical island before checking in at your hotel (check-in from 3:00 p.m.) and savoring a delightful dinner. Koshikijima is known for its unspoiled natural beauty, dramatic cliffs, and unique rock formations shaped over 80 million years. You can also visit scenic spots such as Nagame-no-hama Beach and the twin lakes Namako-ike and Kai-ike. For a more comfortable and flexible experience, you can choose the optional car rental to explore the island at your own pace.