For at least 15 years, Airi Kakimoto was confined to a 32-square-foot room without windows or heat, according to police. Her suffering would only be exposed with her death. Authorities in Japan say the 33-year-old was found dead in her parents' Neyagawa home on Saturday. She died days earlier around Dec. 18 from exposure to cold in an unheated structure her parents had built separate from the main home, report CNN and the Japan Times.