One Piece - Season 8 - Eps 229: The Dashing Sea Train and the City of Water: Water Seven!
After the Going Merry narrowly escapes being hit by a "sea train", the crew meets an old woman, Kokoro, and her granddaughter, Chimney. Kokoro gives Luffy a map to Water Seven. Luffy, Nami, and Usopp buy boats driven by sea monsters called "yagara".
About One Piece

Title: One Piece
First Air Date: 1999-10-20
Last Air Date: 2024-10-13
Status: Returning Series
Rating: 8.7/10 (from 4815 votes)
Language: JA
Seasons: 23
Total Episodes: 1123
Network: Fuji TV
Genres: Action & Adventure, Comedy, Animation
Production Companies: Toei Animation, Fuji Television Network, Avex Trax, Shueisha, Asatsu-DK
Synopsis
Years ago, the fearsome Pirate King, Gol D. Roger was executed leaving a huge pile of treasure and the famous "One Piece" behind. Whoever claims the "One Piece" will be named the new King of the Pirates. Monkey D. Luffy, a boy who consumed a "Devil Fruit," decides to follow in the footsteps of his idol, the pirate Shanks, and find the One Piece. It helps, of course, that his body has the properties of rubber and that he's surrounded by a bevy of skilled fighters and thieves to help him along the way. Luffy will do anything to get the One Piece and become King of the Pirates!
Cast

Mayumi Tanaka
Monkey D. Luffy (voice)

Kazuya Nakai
Roronoa Zoro (voice)

Akemi Okamura
Nami (voice)

Kappei Yamaguchi
Usopp (voice)

Hiroaki Hirata
Sanji (voice)

Ikue Otani
Tony Tony Chopper (voice)

Yuriko Yamaguchi
Nico Robin (voice)

Kazuki Yao
Franky (voice)

Cho
Brook (voice)

Katsuhisa Houki
Jinbe (voice)