It is a plan to snorkel around the popular spot “blue cave” located in the northern part of Ishigaki Island. As the name implies, the water inside the cave is clear blue, and reflects blue sky and sun to shine more blue if conditions are met. The inside of the cave can land and explore, and it is possible to observe the natural products of Ishigaki including caves and caves. And after exploring the cave, I’m waiting for snorkeling time. Swim in the trench where many beautiful fish and corals await. There is no doubt that the sea of outstanding transparency!