|Japanese translated||Ryota Kajiki|
|WC 2004||Big Wave|
Mako Tsunami, known as Ryota Kajiki (梶木漁太 Kajiki Ryōta) in the Japanese version, is a character in the Yu-Gi-Oh! World Championship Tournament 2004. This is a video game depiction of Ryota Kajiki from the manga and Mako Tsunami from the anime.
Mako is a Level 2 opponent. The player can unlock him by defeating all Level 1 opponents at least three times each and having at least half of the cards from the Black Luster Soldier pack.
Mako's Deck relies on "Umi", which powers up his monsters, and can be used with "Tornado Wall", to prevent him taking battle damage, and "The Legendary Fisherman", who becomes protected from Spell Cards and battle. He also uses "A Legendary Ocean", as a substitute for "Umi", also allowing him to Summon Level 5 monsters, such as "The Legendary Fisherman", without Tribute.