Soichiro Ota (known in the English dub as Soichiro Ota) is one of the Big Five from the anime Yu-Gi-Oh!. He's the technical expert of the Big Five and arguably the most significant of them, as he is the only one who succeeds in stealing a body. He is also described by some as being a nerd.

He is voiced by Hiromi Sugino in the original and by David Wills in the English dub.


He owned his own lab where he built war machines that he built for his boss, Gozaburo Kaiba. When Seto Kaiba took over (in which the Big Five joined forces with him), he burned down Nesbitt's lab, as Seto wanted to make games at Kaiba Corp rather than machines for war.

Ota as the Machine Sergeant.

After they joined forces with Pegasus J. Crawford to take over Kaiba Corp and Pegasus was defeated by Yugi Muto, Seto fired the Big Five, but they trapped him in a virtual world, but when their Five God Dragon was destroyed, they were imprisoned in the virtual world instead.

Ota as the Perfect Machine King.

Their bodies were destroyed eventually but they soon found Noah Kaiba in his virtual world, and worked for him to steal the bodies of Yugi and the gang. Taking the form of Machine Sergeant (Robotic Knight in the English dub), Ota targeted Shizuka Kawai, who was with Hiroto Honda and Ryuji Otogi, but eventually decided on dueling the three of them at once, though he seemed intent at defeating Shizuka first (likely because she has never dueled before). Despite the fact that it was three-on-one, with Honda and Shizuka as the least experienced of the four, Ota gained the advantage. He destroyed Honda's deck master while aiming for Shizuka's monster, sending Honda falling into a molten pit, trapping his mind in a robot monkey and holding his body in a virtual chamber.

Ota as Honda.

Ota entered the field himself during the duel, and immediately fused with Machine King into Perfect Machine King. He was defeated when he and Shizuka's fusion monster, Saint Jeanne, destroyed each other, but he won Honda's body and, after a confrontation with Kaiba and Honda, kidnapped Mokuba Kaiba, who was then taken from him by Noah.

Afterward, Konosuke Oshita, Shuzo Otaki, Chikuzen Oka and Kogoro Daimon entered Honda's body and all five of them dueled Yugi and Katsuya Jonouchi at once. Otaki took over for one turn but fell victim to Yugi's trap after which Daimon took over. After the Big Five were defeated, Noah imprisoned them each in a different corner of the virtual world.

Noah imprisons the Big Five.

Ota was killed along with Noah, Gozaburo and the other members of the Big Five when Noah used a satellite attack to destroy the fortress that the virtual world was stationed in, deleting it and everyone inside it. He was later seen in season 4 flashbacks when Amelda mentions Kaiba's stepfather kidnapping his parents and brother though whether Nesbitt was real or another illusion is in question with Dartz revealing he kidnapped Amelda's parents and brother disguised as Gozaburo.


Ota is obsessed with robots. While in the form of a robot in the virtual world, he would often talk like one, using terms such as "negative" and "disassemble" and referring to Shizuka only as "the female".

Yu-Gi-Oh! The Abridged Series

Nesbitt, like the other members of the Big Five, are board members in 4Kids working for Noah in LittleKuriboh's Yu-Gi-Oh! The Abridged Series. Nesbitt, as a robot, battles Tristan, Duke, and Serenity. Tristan falls into lava after defending Serenity from Nesbitt's attack. Then Nesbitt transforms into Super Giga Mecha Nesbitt, who has rocket power fists and battles Duke's theme song, in which he wins. However, Duke confuses Super Giga Mecha Nesbitt by reveals the protagonist of the new series Yu-Gi-Oh! Zexal confusing him overloading him causing him to self destruct.

In the next episode, he returns, possessing Tristan and kidnapping Mokuba for Noah. While possessing Tristan he does not sound like Nesbitt, but like Tristan dual voice effect to it, however he is identified and gives Kaiba the Darth Vader speech.

In Episode 54, he teams up with the rest of the Big Five to duel Yugi and Joey, but they are defeated, and Noah banishes them to the darkest corners of the internet. Nesbitt is sent to chat roulette, where he talks with Naruto like a robot.


  • Initially, Ota stood out the least of the Big Five, being mostly out of sight once they were no longer shadowed and having only two lines in Season one and none in Season three up until his duel with Honda, Shizuka and Otogi. Ironically, Ota played the biggest role as he was the only one who was successful in stealing a body, though this excluded him from when the other four chased Jonouchi, Shizuka and Otogi.
  • His voice is higher pitched in flashbacks.
  • In Season four, Ota is seen is flashbacks with Gozaburo, which means this may have just been another illusion.


           Yu-Gi-Oh logo.png Villains

Dark Yugi | Shadi | Seto Kaiba | Mokuba Kaiba | Yami Bakura | Maximillion Pegasus | Croquet | Pegasus' Guards | Duke Devlin | Marik Ishtar | Yami Marik | Odion Ishtar | Mr. Ishtar | Weevil Underwood | Rex Raptor | Paradox Brothers | Bandit Keith | Sid | Bonz | Zygor | Panik | Gozaburo Kaiba | Thief King Bakura | Jinzo | Diabound | Zorc Necrophades
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