The Japanese Ground Self-Defense Force said Thursday that the head of its security unit based in Miyako Island, southwestern Japan, was among those who went missing following a helicopter crash in waters off Okinawa earlier this month.Six people, who apparently were aboard the GSDF helicopter, have been found on the seabed northwest of Miyako Island. Five of them have been confirmed dead so far.The GSDF announced that Col. Toru Niwata, 48, and Maj. Hiroki Koso, 34, senior members of the 8th Division based in Kumamoto Prefecture, were among the dead.It also announced that the head of the Miy…READ FULL ARTICLE