95,173pages on
this wiki
Page Help0
  • Gansley
Japanese translated
  • Konosuke Oshita

Big 1

  • Male
  • Career
Previous occupation

Vice-president of business strategy

Previous organization


  • Duelist

The Big Five

Anime Deck


Deck Master

Deepsea Warrior

Anime debut

Yu-Gi-Oh! episode 8: "Everything's Relative"

Video game debut

Yu-Gi-Oh! Destiny Board Traveler

Voice actors
  • Nobuyuki Saitō (Legendary Heroes)
  • Shintaro Sonooka (Virtual World)

Gansley, known as Konosuke Oshita in the Japanese version, is the former Vice-President of Business Strategy of KaibaCorp and the leader/founder of the Big Five where he is the oldest of the group.



Gansley is an old man with grey hair, who is partially bald. He is short, fat, and carries a cane. He wears a double-breasted tan suit. In the Virtual World he takes the appearance of Deepsea Warrior.


Gansley is obsessed with business, and as such refers to his monsters as employees. He often flaunts his knowledge of business and believes that his corporate experience gives him an advantage when it comes to Dueling. He is shown to have been unethical in his career, often firing employees as he pleased. In the English dub, he gives Yugi Muto advice on business, claiming his own career as a corporate tycoon started as a child, where he stole a lemonade stand from a neighbor, and expanded that into the largest distributor of frozen canned lemonade in his region.

In the Japanese version, he quotes various warlords and philosophers on how to build a successful army.

In the Japanese version, Gansley knows of Yami Yugi's existence and refers to Yugi as Type-A and Yami Yugi as Type-B Yugi. In the English dub, Gansley shows no knowledge of Yami Yugi.


In the English dub Gansley speaks with a deep and somewhat hoarse voice.



Gansley worked as vice-president of business strategy at KaibaCorp. Gansley, along with 4 other KaibaCorp employees form a group known as the Big Five.

Seto Kaiba, the adoptive son of the head of KaibaCorp, Gozaburo Kaiba, convinces the Big Five that Gozaburo is mistreating them and he'll help restore them to their former power. The Big Five agree, and thus buy 49% of KaibaCorp. Combined with 2% that Gozaburo had previously given to Seto for a test to prove his business skill, the Big Five vote out Gozaburo and vote in Seto as the president of the company.

Duelist Kingdom

However, Seto quickly backs out on their deal, stripping them of their power and leaving the Big Five little more than figureheads and consultants. Furious over their betrayal, the Big Five strike a deal with the president of Industrial Illusions, Maximillion Pegasus in an attempt to overthrow Seto. If Pegasus defeats Seto and Yugi Muto in duels, then they will use their 49% to vote Pegasus into power of the company by kidnapping Mokuba Kaiba, who has been entrusted with the security codes to the two percent the Big Five need.

The Big Five and Pegasus' plan fails, after Pegasus is defeated by Yugi. In the manga, Gansley and the Big Five are fired by Seto and are never seen again.

Legendary Heroes


Gansley in Legendary Heroes arc.

In the anime, the Big Five avoid being fired by making excuses and offering Seto his complete virtual reality game as a peace offering. Eager to try out the virtual reality game, Kaiba refrains from immediately firing them and enters the virtual world. The Big Five then trap Kaiba in the virtual reality.

However Kaiba is rescued by Mokuba, Yugi, Joey, and Mai Valentine. The Big Five reprogram the game and set the "Mythic Dragon" as the final boss. However, it is defeated by Yugi and Kaiba's "Dragon Master Knight".

Virtual Realm

After losing in Legendary Heroes, the Big Five got trapped in the virtual world instead of Kaiba. Here they meet up with Noah Kaiba. Having Seto as a common enemy, they made plans for revenge.

During the Battle City tournament, Noah has the KaibaCorp blimp sucked into an undersea fortress, where the virtual world's main servers are. They force Seto and Mokuba Kaiba, along with Yugi and his friends into the virtual world again. Using an altered set of Duel Monsters rules, involving Deck Masters, the Big Five duel their enemies in the hopes of stealing their bodies to escape the virtual reality.


Gansley as "Deepsea Warrior".

Gansley takes the form of "Deepsea Warrior", which he uses as his Deck Master. He chooses to duel Yugi, and claims to have perfected a strategy to defeat him. As Yugi constructs a Deck, Gansley misinterprets Yugi saying "Kuriboh", as him choosing "Kuriboh" as his Deck Master. He refuses to let Yugi change his Deck Master after that. Exploiting his Deck Master's ability to deflect attacks back at Yugi, Gansley manages to get the upper hand against Yami Yugi and is about to win, but Yugi takes control and uses "Kuriboh's" Deck Master effect to save them. Yami then uses "Kuriboh", combined with "Rainbow Blessing", allowing him to bypass Gansley's monsters and special ability to attack him directly with "Swift Gaia the Fierce Knight", defeating him.

Gansley, along with Crump, Johnson, and Leichter, having failed to win their targets' bodies, go behind Noah's back and attempt to steal the bodies. They chase down Duke Devlin, Serenity Wheeler, and Joey. As they argue over who gets which bodies, Noah makes contact and tells them off. Since Nezbitt didn't rightfully take Tristan Taylor's body, Noah allows the Big Five to share Tristan's body in order to Duel Yugi. Should they win, they would get their freedom.

The Big Five face Yugi and Joey, using Tristan's body. The 5 each switch control and Deck Master throughout the Duel. Gansley only takes full control for 1 turn. Towards the end of the Duel, the Big Five uses "Dragon Revival Ritual" to combine their Deck Masters into the "Mythic Dragon" again. The dragon is destroyed by Yugi and Joey's "Mirage Knight", but the Big 5 use "A Deal with Dark Ruler" to make "Berserk Dragon" their Deck Master. Ultimately, it is destroyed by "Dark Magician Knight", costing them the Duel.

Noah refused to give the Big Five any more chances. In the original version, Noah deleted Gansley along with the other Big Five members. In the dub, Noah imprisoned the Big Five in the different corners of the Virtual World, which were destroyed when the Virtual World was destroyed.



Gansley uses a Reptile/WATER Deck that relies on Summoning many monsters to use the ability of his Deck Master "Deepsea Warrior", called "Reflector Hole", which negates an opposing attack and inflicts damage to the opponent equal to the attacking monster's ATK at a cost of two Tributes. Gansley further uses control cards to limit his opponent's options, either depleting their hand or limiting the number of monsters they can maintain on the field.

Anime Deck

Nightmare Troubadour

Ocean Conqueror


Opponent(s) Episode(s) Outcome(s)
Yugi Muto/Yami Yugi 99-101 Lose
Yugi Muto/Yami Yugi and Joey Wheeler 111-113 Lose (with the Big Five)


  • Unlike the other four, Gansley is not shown disintegrating when he is defeated by Yugi.
  • He is the only member of the Big Five whose Duel takes three episodes instead of two (though this could likely be due to more focus on the other characters). Ironically he only Dueled for one turn in the Duel against Yugi and Joey.
  • He is also the only member of the Big Five to not express interest in taking a female form; Crump tried to take over Téa's body, Nezbitt specifically intended to do the same to Serenity over Tristan and Duke, Johnson disguises himself as Mai when he introduces himself to Joey, and Leichter, while not explicitly trying to steal Serenity's body, seemed to give her and Joey equal consideration before getting into argument with Crump.
  • Along with Johnson, Gansley is featured the most in Season 1.


  1. The third copy can be seen in his hand during episode 101 before he Summons "Melchid the Four-Face Beast".

Around Wikia's network

Random Wiki