One day, Nobita (voiced by Megumi Ohara) stumbles upon a childhood teddy bear sewn by his late grandmother. He implores Doraemon (voiced by Subaru Kimura) to travel back in time to visit his departed grandmother (voiced by Nobuko Miyamoto). After their reunion, his grandmother expresses a wish to witness Nobita’s grown-up self getting married. Complying with her request, Nobita and Doraemon embark on another journey to the future. On the day of the wedding, attended by everyone, the crucial groom, adult Nobita (voiced by Satoshi Tsumabuki), is mysteriously absent. In a desperate attempt, Doraemon orchestrates a scenario where young Nobita impersonates his older self and weds Shizuka (voiced by Yumi Kakazu). But where has the real adult Nobita vanished to?

Imported by OCE in 2021;
Won the championship in both the 2021 box office rankings for Japanese-imported films and Japanese-imported animated films in Mainland China