The centrepiece of the Peace Memorial Park is the Okinawa Prefectural Peace Memorial Museum, which focuses on the suffering of the Okinawan people during the invasion of the island and under the subsequent American occupation. While some material may stir debate, the museum's mission is to serve as a reminder of the horrors of war so that such suffering is not repeated. There is a free English-language audioguide available, providing great detail of the 2nd-floor exhibit.