(鉄りゅ, Tetsu ryu)






Literal English

Iron Style


Appears in




Kekkei Tōta, Ninjutsu

Basic Natures

18px-Nature_Icn_Lightning_svg.png Lightning Release
18px-Nature_Icon_Earth_svg.png Earth Release
18px-Nature_Icon_Fire_svg.png Fire Release


Yotsuki Clan

Village of Origin

Kumogakure symbol Kumogakure

Known Weilders

Mariko Yotsuki
Raiden Yotsuki
Nishiko Yotsuki


Iron Release: Iron Dragon Scales
Steel Release: Impervious Armour


The Tetsuryu is a very rare and advanced nature kekkei tōta formed through the simultaneous use of lightning, earth, and fire-based chakra natures to create both Iron and Steel release.

This Kekkei Tota appears in some members of the Yotsuki Clan. It has not appeared in a member of the clan since the death of Yao, called the Great Dragon, during the First Shinobi World War. It allows the user to use Iron Release jutsu and was thought to be extinct until Mariko and her generation of the clan were revealed to possess it. There are two forms of it, but the conditions to unlock the second stage of the kekkei tōta have been forgotten.


The Tetsuryu's best known ability is the hardening of the body, especially the skin giving it an iron like consistency and texture.

First Stage

The first stage is the ability to use Iron Release.

Second Stage

The second stage does not appear too different from the first unless you look closely. Upon its activation the Iron Release nature transforms into Steel Release. The last one capable of Steel Release was Yao, who was killed and his kekkei genkai taken by the missing-ninHiruko.


  • The kekkei genkai was inspired by Gajeel Redfox's dragon slayer magic and its from this it gets its name.

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