Shizuka accidentally swallows her mother's opal which is worth 500,000 yen. Doraemon and Nobita use the miniature sub from episode 41 to recover it from inside her, but play a trick on her which results in Nobita swallowing an eraser, which will have to be recovered.
| Title | Even It's in the Gaster-Water |
|---|---|
| Genres | Action & Adventure Animation Comedy Sci-Fi & Fantasy Kids Family |
| Release Date | 1979-07-13 |
| Episode Runtime | 00 Hours 11 Minutes |
| Season Number | 1 |
| Episode Number | 89 |
| Production Companies | Shin-Ei Animation |
