|The following article has no references to the official sources.|
The Ryugu is a ship from Ryugu Kingdom.
The vessel is a large hull built around a giant oarfish and is used to transport people more easily. The carriage has several oars sticking out of it.
While half of the Straw Hat Pirates were enjoying Mermaid Cove, Fukaboshi and his brothers arrived on the Ryugu. Sanji suddenly had a massive nosebleed. Luffy was worried and asked for a donor. When they ignored him, Keimi stole the Ryugu from them and she, along with the Straw Hats, left in order to find a blood donor for Sanji.
- The writing on the carriage says 竜宮城 (Ryūgū-jō), meaning Ryugu Palace.