Acting as a prequel, this short subject shows the life of Doraemon before traveling to the 20th century: how he was made, how he was partially broken, how he lost his ears, how he met the Nobi family and decides to return to the past to help Nobita.
| Actor | Role |
|---|---|
 Nobuyo OyamaDoraemon (voice) | Doraemon (voice) |
 Chisa YokoyamaYellow Doraemon (voice) | Yellow Doraemon (voice) |
 Keiko YokozawaDorami (voice) | Dorami (voice) |
 Yoshiko OhtaSewashi Nobi (voice) | Sewashi Nobi (voice) |
 Yuko MinaguchiNoramyaako (voice) | Noramyaako (voice) |
 Ichiro NagaiPrincipal Teraodai (voice) | Principal Teraodai (voice) |
 Minoru YadaFujiko F. Fujio (voice) | Fujiko F. Fujio (voice) |
 Run SasakiMasako Fujimoto (voice) | Masako Fujimoto (voice) |
 Fujiko F. FujioVoice-over | Voice-over |