One Piece Encyclopedia
| Umi Ressha | "Sea Express" - The Umi Ressha is a train that travels between islands over the surface of the sea. Its inventor was Tom, the legendary carpenter of Water 7. |
| Umibouzu | "Sea Bonze" - A spirit from the Japanese folklore. A giant creature that lives in the sea which is said to capsize the ship of those who dare to speak to him. |