Nobita, Gian, Shizuka ... thus turning the future (Nobita's time) into a demon-ruled world. In order to reverse the change, Doraemon and gang needed to return to the past and capture the demons ...

Educational video produced by the New Energy and Industrial Technology Development Organization (NEDO) in 1994, it was later included on the 13th issue of Boku, Doraemon magazine released on ...