For the Movie 6 character of the same name, see Kotetsu (Non-Canon).

Kotetsu was a swordsmith who crafted the cursed Great Grade sword Nidai Kitetsu. He is an ancestor of the present-day Kozuki Family in Wano Country, namely Sukiyaki, Oden, Momonosuke, and Hiyori.


Kotetsu’s appearance is unknown.

Abilities and Powers

Kotetsu is an excellent master swordsmith, having forged the legendary Nidai Kitetsu which is powerful enough to be classified as one of the 21 Great Grade swords. Through unknown means, he was also able to place curses on his swords, which certain individuals, such as Zoro, can even sense.


Kotetsu lived sometime long ago. During his life, he crafted the sword Nidai Kitetsu. He also had children that continued his lineage.


  • Kotetsu’s name might come from Nagasone Kotetsu, a famous Japanese swordsmith from the Edo Period.


  1. 1.0 1.1 1.2 1.3 1.4 One Piece Manga and Anime — Vol. 91 Chapter 912 and Episode 897, Kotetsu is first mentioned.
  2. One Piece Manga — Vol. 104 Chapter 1053 (p. 8-10), Tenguyama Hitetsu, Kotetsu’s descendant, is revealed to be Kozuki Sukiyaki.

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