Sewashi and Doraemon find themselves way back in time and meet Nobita. It is up to Doraemon to take care of Nobita or else he will not return to the present.

Wasabi Mizutaas Doraemon (voice)
Megumi Ooharaas Nobita (voice)
Yumi Kakazuas Shizuka (voice)
Subaru Kimuraas Gian (voice)
Tomokazu Sekias Suneo (voice)
Satoshi Tsumabukias Adult Nobita (voice)
Sachi Matsumotoas Sewashi (voice)
Shihoko Haginoas Dekisugi (voice)
Aruno Taharaas Yoshio Minamoto (voice)