The US military has imposed a curfew on its troops in Okinawa amid tensions over incidents involving service personnel, including an alleged rape.

Many Okinawans dislike the US presence. The recent alleged rape of a teenager by a US marine has caused outrage.

In 1995 there were mass protests in Okinawa after US troops gang-raped a 12-year-old girl - an incident which raised concerns for the future of the US-Japan security alliance.

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