The government has lodged a protest with the United States over an alleged trespassing incident committed by a service member in Okinawa, asking that military discipline be bolstered.

Junichi Ihara, director general of the Foreign Ministry's North American Affairs Bureau, told Kurt Tong, deputy chief of mission at the U.S. Embassy, that the incident was deplorable and asked the U.S. to tighten discipline among its forces.

Tong said the U.S. government will continue to work to preventng similar incidents.