|Japanese translated||Ryota Kajiki|
Mako Tsunami, known as Ryota Kajiki (かじき りょうた Kajiki Ryōta) in the Japanese version, is a character in Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist. This is a video game depiction of Ryota Kajiki from the manga.
Mako is a Stage 1 opponent available from the start. By defeating Mako and the other Stage 1 opponents five times each, the player can unlock Stage 2.
Mako's Deck is made up of mostly Water monsters. It contains "Fortress Whale" and "Torrential Tribute", which he used in the manga.
The following cards can be won, by defeating Mako. The chance of winning a card is indicated by the "%" (chance out of 100) and "2048th" (chance out of 2048) columns.