It is shown to be able to withstand Dying Will Flames to some extent. Yamamoto is also able to use this Box to support his Shigure Soen Ryu forms, which require the use of water. The Water that comes out of this Box Weapon has the Rain Flame's Tranquility characteristic. When used in battle, the Water weakens and/or nullifies enemies' attacks and renders them useless, as seen when Yamamoto was fighting Nosaru. Yamamoto quenched the Storm Flames Nosaru projected with his Box Weapon.
This Box Weapon is similar to Sakamaku Ame.