Takegashima

A small marine park off the southern Tokushima coast renowned for its crystal-clear water and thriving aquatic life. Glass-bottom boat tours let non-swimmers peek at the colorful reef below, while snorkeling and diving options bring you face-to-face with tropical fish, sea slugs, and coral formations. The rocky coastline and tidal pools are worth exploring at low tide as well. It is a wonderfully low-key alternative to the more developed beach destinations further south, with a natural, unspoiled character that rewards a slow-paced half-day visit.