According to the Japan Coast Guard, on the night time of the eighth, the Ground Self-Defense Force obtained data that an individual gave the impression to be floating close to the coast of Irabu Island, Okinawa Prefecture.
Around Irabu Island, on the sixth, a helicopter of the Ground Self-Defense Force with 10 members on board disappeared throughout the flight, and the Self-Defense Forces and the Japan Coast Guard are continuing with affirmation.
Source