Gigi Island Murgul Hunter

Nobita and his friends go to Gigi Island to fish. It is said that there are strange fish there that are more ferocious than sharks. In order to make sure that everyone can catch fish, Doraemon orders the "Handbar" tool. However, the sample "Time Tunnel" that comes with it is taken away by Gian as a toy, which indirectly causes Nobita and Doraemon to accidentally travel back to the Edo period when they catch a big fish.