- This article is about the chapter. For the volume, see Volume 23.
"Authenticity" (真贋, Shingan, Tonari: 147) is the one hundred eighth chapter of the One-Punch Man manga series.
Short Summary
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Long Summary
Iaian, Okamaitachi, and Bushidrill are shown bruised and battered after their battle with Devil Long Hair. Having sliced through every strand of Devil Long Hair's hair, the monster collapses and admits it was his Achilles heel. The disciples express surprise at their victory, noting that they would not have succeeded alone, and they worry that more monsters of similar strength may still appear. Iaian reassures them that they need not worry about their master.
The scene shifts to Atomic Samurai, who is seen cutting down multiple monsters. A sword-wielding monster named Sword Devil Executioner praises Atomic's swordsmanship. Surprised that a monster survived his initial slash, Atomic Samurai finishes him off before the monster can react. He then asks if any monsters are still alive to raise their hands. G5 raises its mechanical arm, stating that it has analyzed all of Atomic's movements, and they begin a rapid sword duel.
Atomic remarks that modern "toys" have become quite fascinating and says he would like to buy one, prompting G5 to launch an attack. Despite copying the Atomic Slash with dual swords, G5 is still defeated. Atomic Samurai slices it into hundreds of pieces, visibly disappointed in the robot's overall performance. He also notes that he was unable to cut through the core of the Machine God, which appears to be made of an unknown material tougher than G5's outer shell. Amid the dust from their clash, a laser beam emerges, but Atomic Samurai deflects it and fires an Air Blade in return. As his flying slash cuts through the smoke, he realizes the true enemy has already escaped, and says he will leave the pursuit to the surface team of heroes.
The focus returns to Atomic Samurai's disciples as they speak with Narinki's Private Squad. The mercenaries express envy over how the three swordsmen can suppress their bloodlust during combat, and they invite them to join the Private Military Company they work for. The disciples decline, explaining that hero activity is part of their training regimen.
When Bushidrill asks Tongara whether their group values heroism or swordsmanship, the mercenary leader responds that such ideals are impractical in real combat. He explains that being a mercenary requires dirty tactics, such as pretending to be scared to mislead enemies. As an example, Tongara recalls how the entire squad appeared to be acting when they cried in front of monsters—but in truth, they were genuinely terrified. Iaian seems impressed by their teamwork and acknowledges the value in following their example.
The scene abruptly shifts to Tareo, who is being chased by Black Sperm. A sudden slash from Atomic Samurai interrupts the pursuit, forcing the monster to dodge. Atomic comments on his speed just as the chapter ends.
Characters in Order of Appearance
Volume Bonus Page
A chibi-like style depiction of Black Sperm dancing or bouncing joyfully.
Gallery
Trivia
- Before being redrawn, the chapter's title was "Atomic Samurai" (アトミック侍, Atomikku-Zamurai) and included a longer fight between Atomic Samurai and G5.[1]
- Due to the mercenaries having been killed by Sweet Mask in the original plot,[2] Tongara's conversation with the disciples did not happen at all in the scrapped version.

