Kūenbu

Kuuenbuu ("Sky Waltz") is the technique Zero learns when he defeats Split Mushroom. This lets him double jump, although he cannot preform Hienkyaku from his second jump. When in the air, he can perform a somersault slashing attack. It is effective when mixed with Tenkuuha, as it can now be both offense AND defense.

Similar techniques

 * C-Sword
 * Ensuizan

Fun Facts
The Kuuenbuu symbol looks almost like the Yashichi, if you look carefully.