The user punches at the opponent with a rush of regular punches. The more punches the user lands, the faster it gets until eventually they become so fast that it creates friction and heat enough to create ki blasts. These ki blasts can be manipulated flexibly to be gentle or intense.
Su used this attack in the Tournament of Power in her Rozie form against base Goku. This attack was enough to push Goku back and even harm him with one of the ki blasts. As she pushes back Goku with the Yacchaina Fist, with much more effort due to Kakunsa being knocked out of the ring, she begins to manipulate the ki blasts simialr to the Hellzone Grenade. However, these were to no effect as Android 17 used his Android Barrier to block them all. Goku soon continues the fight, and was able to overcome the fighting style due to studying it's weak points.
- Yacchainā is a pun to both yacchaina (meaning "do it") in Japanese and "China".