Akarui

This blade was a weapon created for usage by Shinko after he joined ROOT. This weapon was crafted by some of the most durable metals that he could get his hands on. The special ability of this weapon, though, is the fact that it has the ability to store Katon chakra within.

By twisting a secret switch upon the bottom of the weapon, the stored up Katon chakra is released into the weapon so that it can become super-heated, granting it the ability to easily tear through other metals.