Project Blue Book Case #678. On March 27, 1950, an unidentified object was observed near Motobu on Okinawa's northwestern coast — the second Blue Book unknown from Okinawa (following Case #984 from Kadena in October 1951). Motobu sits on a rugged peninsula that saw fierce fighting during the 1945 Battle of Okinawa. By 1950, the island was a major American military stronghold in the western Pacific, with facilities supporting both the occupation of Japan and operations in the Korean theater. The case was classified "Unknown."

Unidentified object observed near the Motobu Peninsula, Okinawa (1950)

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