Buso Haki, the Armament Haki of Haze Piece, is the ability that lets you land damage on Logia Devil Fruit users even after they transform into their element. It also raises your Sword and Combat damage, which makes it a core unlock for both PvP and tougher PvE fights. There are two levels to earn, each tied to a specific NPC, cash total, and character level.
Quick answer: Reach level 350 with $100,000 and talk to Old Man Silver in Logue Town to buy Buso Haki Level 1. For Level 2, reach level 1150 with $250,000 and speak to the Buso Level 2 Trainer on Revolutionary Island.
Buso Haki requirements and rewards
Both levels are straight purchases from a trainer once you meet the level and cash thresholds. There is no combat quest to finish for Buso Haki, so the grind is about reaching the required level and saving the money. Here is how the two tiers compare.
| Tier | Level | Cost | Trainer / Location | Damage bonus |
|---|---|---|---|---|
| Buso Haki Level 1 | 350 | $100,000 | Old Man Silver, Logue Town | +5% Sword and Combat |
| Buso Haki Level 2 | 1150 | $250,000 | Buso Level 2 Trainer, Revolutionary Island | +7.5% Sword and Combat |
How to unlock Buso Haki Level 1
How to unlock Buso Haki Level 2
How to use Buso Haki and confirm it worked
Buso Haki is bound to the J key. When you activate it, your hands turn fiery and your physical attacks connect with elemental fruit wielders that would otherwise be immune. That damage window against transformed Logia users is the clearest sign the ability is active and working as intended.
You will know the purchase succeeded when the trainer accepts your money and the ability becomes usable on your attacking items. If a trainer refuses, the cause is almost always the same. You either have not hit the required character level or you do not have the full cash amount in hand.
Note: Buso Haki is not only an offensive tool. It is frequently useful in PvP and is sometimes needed for PvE encounters where an opponent relies on an elemental transformation to avoid ordinary hits.
