Ep. 90: Nobita and Doraemon travel back in time to prevent the theft of a family diamond ring.
Aired on July 14, 1979
90
While a photo album on the floor evokes nostalgia, Nobita's mother recounts a family legend regarding a precious diamond ring that was stolen by two boys in the past. Motivated by this story, Nobita and Doraemon use their time machine to travel back and intervene in the robbery. They aim to stop the thieves from taking the heirloom. However, upon reaching the past, they discover that the diamond ring is actually made of plastic. It was created specifically as a lesson for Nobita's mother rather than being a genuine valuable item.
Episodes
- Ep. 86 · Doraemon assists Nobita with a moving arrow device for easy target placement
- Ep. 87 · Nobita uses a protective snail shell after his mother accuses him of hiding exam results.
- Ep. 88 · Doraemon and Nobita utilize a broadcast mirror to advertise a small sweet shop
- Ep. 89 · Nobita encounters a defective lifeform creation machine left by Doraemon.
- Ep. 90 · Nobita and Doraemon travel back in time to prevent the theft of a family diamond ring.
- Ep. 91 · Nobita and Doraemon persuade parents to relocate to a castle owned by a mysterious woman
- Ep. 92 · Nobita and Doraemon proceed with their rescue mission in the haunted castle
- Ep. 93 · Nobita Uses Doraemon's Powder to Swim Through Solid Ground
- Ep. 94 · Doraemon introduces the Love Love Parasol device in this episode