Ryujiro Mizunuma

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Ryujiro Mizunuma
Ryujiro Mizunuma
  • Ryujiro Mizunuma
  • Ryu[1]
  • Mad Marsh[1]
  • Dragon god of the bottomless swamp[1]
  • Male
Kotaro Mizunuma (older brother)[1]
  • Duelist
Anime DeckZombie[1]
Anime debutYu-Gi-Oh! VRAINS episode 61: "Despair From Darkness"
Appears in
AnimeYu-Gi-Oh! VRAINS
Voice actors
JapaneseSho Nogami
Mizunuma, Ryujiro

Ryujiro Mizunuma (みずぬま りゅうろう, Mizunuma Ryūjirō) is a character in the Yu-Gi-Oh! VRAINS anime.



Ryujiro had previously competed in a National Duel tournament.[1]

Yu-Gi-Oh! VRAINS[edit]

Ryujiro, his older brother, Kotaro and three others harassed a student in a shopping district. They were stopped by Takeru Homura. Ryujiro urged his brother to just beat Takeru up, but Kotaro cited that he had dangerous eyes and the group fled. Later, Ryujiro spoke about Link VRAINS and Playmaker to one of the other gang members. He was interrogated by Takeru, who was looking for information on those topics. Kotaro intervened and Takeru left. Kotaro vowed to make Takeru pay, but Ryujiro's interaction with Takeru had given him an idea.[1]

The group kidnapped Kiku, and sent her friend, Hana to get Takeru. When Takeru appeared, they released Kiku after Takeru agreed to Duel Ryujiro, with the wager that Takeru would become their minion if he lost. Ryujiro built up a strong defense, and though his monsters were destroyed by Takeru, he avoided taking damage and proceeded to Summon "Despair from the Dark".[1]


Ryujiro plays a Zombie Deck, focused on continually Summoning and reviving his monsters to generate card advantage.



Opponent Episode(s) Outcome
Takeru Homura 61, 63 Lose (flashback)


  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Yu-Gi-Oh! VRAINS episode 61: "Despair From Darkness"