Hiwasa Chelonian Museum Caretta, Natural history museum in Minami, Japan.

The Hiwasa Chelonian Museum Caretta opened in 1985 beside Ohama Beach in Minami, Tokushima Prefecture, and reopened on 19 July 2025 after renovation. Its first floor shows stuffed sea turtles from around the world and the course of turtle evolution, while the second floor has a turtle quiz and a 120-inch high-definition theatre. An outdoor pool holds turtles over one metre long; in 2025 the museum kept 54 turtles of 21 species, including the 1950-born "Hamataro".

The museum opened on 4 August 1985 beside Ohama Beach in Muroto-Anan Quasi-National Park as a base for sea turtle research and protection. It closed from June 2023 for renovation of its ageing facilities and displays, and reopened on 19 July 2025. Its name Caretta comes from the scientific name of the loggerhead turtle.

The museum sits near Ohama Beach, where local people have long watched sea turtles come ashore to nest during summer months. This connection to wildlife shapes how the community views the surrounding waters.

The museum is closed on Mondays, or the following day when Monday is a public holiday, and also from 29 to 31 December. It is about a 20-minute walk from Hiwasa Station on the JR Mugi Line. Opening hours are 9:00 to 17:00.

The museum keeps Hamataro, a loggerhead born in 1950 and named in March 2010, cited as the world's oldest known captive turtle of documented age. As of 2025 the collection held 54 turtles of 21 species, land and water dwellers together, in pools including an outdoor one built for animals over a metre long.