Engetsu Island is a small, uninhabited island located in the Seto Inland Sea of Japan. It is known for its unique crescent shape, which resembles a full moon, and is often referred to as "Moonset Island." The island is part of Kagawa Prefecture and is a popular spot for photography and sightseeing due to its scenic beauty. The island is accessible by boat and attracts visitors who enjoy nature and tranquility. Surrounding waters are rich in marine life, making it a great location for snorkeling and fishing. Engetsu Island is also a part of the Setonaikai National Park, which showcases the natural beauty of the region.