Nami-Kozō (波小僧 Nami-Kozō, lit. Wave Boy) is a yōkai boy that surfs.
Nami-Kozō resembles a small boy that has yellow skin with several small blue spots around his torso and arms, light blue hair and his torso is a lighter yellow. His eyes are rather big and have orange irises and small black pupils. He only wears a pair of pale, light blue shorts that is tied by a white cord.
Along with Iwanabōzu, Nami-Kozō appears and becomes one of the 47 Yokai warriors in episode #92 of the fifth anime adaptation, Violent!! Yōkai Waterwheel!! Good Luck Nami-Kozō. He is the 19th of the chosen 47 Yōkai Warriors and the representative of Shizuoka Prefecture.
- A statue of Nami-Kozō appears as one of the numerous bronze statues made around Sakaiminato, to keep Kani-Bōzu from being lonely and as a tribute.