Went down in mountainous forest near the city of Kamaishshi, in the northern part of Japan. The crash occurred at 13:30 hours and 85 miles south of Misawa AB. The aircraft was on a training mission. Cause of the crash was human error. A malfunctioning G-suit distracted the pilot who gave it an inspection. The aircraft at the time was 418 at only 3,300 feet. When the pilot returned his attention to flying, he found a wind screen full of the terrane of a ridge. He pulled back on the stick, but flew straight through the trees on the ridge. The cut was 85 feet long, 35 feet wide and just 20 feet above the ground. Forty-five seconds after hitting the trees, the pilot ejected safely.