Mitsutaka Uchikoshi, 35, went missing on 7 October 2006. "I lay down... in a grassy area, which felt good in the sunshine, and eventually I fell asleep, that's the last thing I remember." He was found by rescuers on 31 October. "He fell into a hypothermic state at a very early stage, which is similar to hibernation," said Dr Shinichi Sato, who treated Mr Uchikoshi.BBC NEWS | Asia-Pacific | Japanese man in mystery survival