Daichi lived in Satellite with a number of other young children, including Taiga, Kokoro, Ginga and Hikari. They were often visited by Crow, who gave them Duel Monsters cards and advised them not to get in trouble with Sector Security.
Daichi was absorbed by the black fog when it was released on Satellite. This was used to Summon "Earthbound Immortal Uru". Crow managed to survive the black fog, and for a brief moment he thought the children did too.
Daichi was released after the "Earthbound Immortal" he had been sacrificed to Summon was defeated.
- Yu-Gi-Oh! 5D's episode 30: ""
- Yu-Gi-Oh! 5D's episode 51: "A Whale of a Ride, Part 1"
- Yu-Gi-Oh! 5D's episode 68: ""
- Yu-Gi-Oh! 5D's episode 137: ""