Boil Release: Unrivaled Strength is a ninjutsu fighting style used by the Five-Tails Kokuō and its jinchūriki.


The user increases the temperature of chakra to the Boiling Point (沸點, futten)[1], generating large amounts of steam and evaporating any water or ice in direct contact with their body.[2] The pressure resulting from this emitted steam can then be used to increase the force behind physical attacks, giving the user Matchless Superhuman Strength (怪力無双, Kairiki Musō).[3] The exact amount of force produced is proportional to the quantity of steam released, as the greater the volume of steam utilized, the larger the pressure that can be built up. By releasing the pressure, not only the strength can be improved, but also the speed.[4]


Han wears special Steam Armour (蒸気の鎧, Jōki no Yoroi) covering his entire body. The armour contains a furnace in its back, where steam is produced. The steam can be built up within the armour for a greater release, allowing just a simple kick to violently send an opponent reeling a great distance away.[5]


  • In video games, Han has shown that he can use the hot steam emitted from this technique to burn opponents around him.[6]


  1. Naruto chapter 684, page 4
  2. Naruto chapter 684, page 5
  3. Naruto chapter 564, pages 8-9
  4. Naruto chapter 565, pages 14-15
  5. Naruto chapter 565, pages 14-15
  6. Naruto Shippūden: Ultimate Ninja Storm 3
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