1,257 Pages

"The Key to His Power" (強さの秘訣, Tsuyosa no Hiketsu) is the second volume of the One-Punch Man manga series.


A single man arose to face the evil threatening humankind.

His name was Saitama. He became a hero for fun. Three years of special training made him lose his hair, but he gained invincible power. He achieved such strength that he can defeat any opponent, however strong, with one punch. Unable to make use of his full strength, he is unsatisfied as a hero, but a cyborg named Genos asked to become his pupil! Then the House of Evolution takes an interest in Saitama's power and sends monstrous assassins after him...

Featured CharactersEdit

Author CommentsEdit


From now on, monsters of various design are sure to show up, so i'm excited!

Yusuke MurataEdit

I first encountered the original One Punch Man on Twitter. I got to know the author there and then made a direct appeal to draw it. It was a very modern way to do things!


  • The page of Zeniru's home being defamed by the Paradisers was redrawn to include an easter egg of King reacting to the impact.
  • The original Chapter 15 featured a ten-page flipbook animation, consisting of Speed-o'-Sound Sonic leaping around Saitama at high speeds. This was condensed into a single-page drawing in Volume 2.


Volume 1 12345678Extra
Volume 2 9101112131415Extra
Volume 3 1617181920ExtraSpecial
Volume 4 21222324Extra
Volume 5 25272829Extra
Volume 6 303132 (1)32 (2)3334Extra 1Extra 2
Volume 7 353637Extra 1Extra 2Extra 3
Volume 8 383940Extra 1Extra 2Extra 3Special
Volume 9 41424344454647ExtraSpecial
Volume 10 484950515253 (1)53 (2)5455Extra 1Extra 2Extra 3Special
Volume 11 5657 (1)57 (2)58596061Extra 1Extra 2
Volume 12 626364656667Extra
Volume 13 68697071ExtraSpecial
Volume 14 72737475
Volume 15 7677787980Extra 1Extra 2
Volume 16 81828384Extra
Volume 17 858687Extra
Volume 18 888990
Volume 19 91929394Extra
Volume 20 9596Extra
Volume 21 979899100101Extra
Online 99100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133
Community content is available under CC-BY-SA unless otherwise noted.