 Prosecutors on the island of Okinawa allege that senior airman Brennan Washington picked up a Japanese woman under age 16 last December, drove her to his home and sexually assaulted her. A total of five such cases have come to light since June. Only two have resulted in arrests. Neither U.S. nor Japanese authorities reported the arrests to the Okinawan prefectural government. Danny Tamaki is Okinawa's governor.