Okamaitachi (オカマイタチ, Okamaitachi) is the A-Class Rank 3 professional hero for the Hero Association and a disciple of Atomic Samurai.


Okamaitachi has been seen wearing a long sleeved sweater and a long dress. Okamaitachi hair consists of two upward arches split at the neck with hairpins on each side of the head and two large dots on each cheek.


While not much is known about Okamaitachi's personality, Okamaitachi apparently have a habit of falling for handsome male monsters. Okamaitachi also love sushi very much.[1]


Webcomic notice The following section contains Webcomic spoilers. You have been warned, manga-only readers.

At some point in the past Okamaitachi, Iaian and Bushidrill fought Child Emperor and lost.


Human Monster Saga

The Blizzard Group Arc

Okamaitachi made an appearance in Fubuki's vision.[2]

Super Fight Arc

Okamaitachi, Iaian and Bushidrill are waiting outside discussing about Garou's hero hunt, while their master Atomic Samurai is attending a meeting with the Council of Swordmasters.[3] After Atomic Samurai killed the monster Haragiri, Atomic Samurai then declared they will strike the Monster Association.[4]

Webcomic notice The following section contains Webcomic spoilers. You have been warned, manga-only readers.

They assist their master and fellow disciples in the raid on the monster association hq. They encounter Devil Long Hair, and Okamaitachi becomes infatuated with him. While Iaian and Bushidrill discuss a plan of tactics, they realize Okamaitachi is distracted and defeats him with the help of their fellow disciples. Iaian tells Okamaitachi to snap out of it, reminding them that this is the first mission in which Atomic Samurai allowed them to act on their own. Okamaitachi attacks with her Air Blade attack, but Devil Long Hair stops it with his hair, shocking the swordsmen. Devil Long Hair counterattacks, stabbing Okamaitachi through the chest. The demon-level monster then extends his hair toward Iaian and Bushidrill, and the swordsmen prepare for battle. The three swordsmen work as a unit, rushing in and cutting Devil Long Hair's hair as fast and as effectively as possible, and manage to defeat him, although they admit it was a difficult opponent, and had they not worked together, they surely would have lost. But Okamaitachi, Iaian, and Bushidrill are attacked by Evil Natural Water, a Dragon-level monster, who defeats all of them and badly injures them, knocking Okamaitachi and Bushidrill unconscious. The three swordsmen are then swallowed up by Pig God, who found them and consumed them, and manages to bring all three of them up to the surface and regurgitate them without any noticeable injuries.

Abilities and Powers

As the A-Class rank 3 hero, it can be assumed that Okamaitachi is exceptionally strong like their fellow disciples. They would be in S-Class if not for Sweet Mask.

Fighting Style

Expert Swordsman: It should be noted that Okamaitachi is under the tutelage of the S-Class hero Atomic Samurai, and is seen wielding a sword. It's to be assumed Okamaitachi is exceptionally proficient in swordsmanship. Fubuki states they would have been S-Class if it wasn't for Sweet Mask.

  • Air Blade (飛空剣, Hikūken): Okamaitachi's special technique; by cutting the air, this technique creates a huge blade of wind. Iaian himself states that the technique looks like the work of gods every time he sees it. However, Devil Long Hair was able to stop the technique with his hair.


Katana: Okamaitachi carries a katana with a curved, glossy hilt and a standard cross-guard.

Hero Rating

Okamaitachi's rating determined by the Hero Association[1]:

Ability Type Stamina Intelligence Justice Endurance Power Popularity Effectiveness Fighting Ability Total

Major Battles

Webcomic notice The following section contains Webcomic spoilers. You have been warned, manga-only readers.
Participants Chapter(s) Episode(s) Result
Okamaitachi, Iaian and Bushidrill vs. Devil Long Hair None None Win
Okamaitachi, Iaian and Bushidrill vs. Evil Natural Water None None Loss


  • Okamaitachi's title is a portmanteau of okama and kamaitachi, better known as the sickle-wielding yōkai or a rapid cutting wind.


  1. 1.0 1.1 1.2 1.3 1.4 One-Punch Man Encyclopedia; One-Punch Man: Hero Perfection, page 36
  2. One-Punch Man Manga; Chapter 44, page 5
  3. One-Punch Man Manga; Chapter 69, page 2-6
  4. One-Punch Man Manga; Chapter 69, page 25-27