Armament Haki (Buso Haki)
Offensive Haki — progression guide and mechanics
Armament Haki (Buso Haki)
OffensiveCoats your attacks and body in black armor, boosting physical and sword damage while letting you damage Logia users. Higher levels stack damage buffs; max rank also adds flat damage resistance.
How to Unlock
Purchase Level 1 from Old Man Silver in Logue City
How to Level
With Armament active, land physical hits on enemies — each valid strike counts toward the next level. Press J to toggle Haki on or off.
How to Unlock (Level 1)

Location
Logue City (Logue Town), Sea 1 — World Map
NPC
Old Man Silver [Buso Trainer]
Requirements
- Player Level: 360
- 100,000 Beli
Toggle Key
J
Level 1 unlock grants +2.5% damage while Armament is active.
Level Progression
Level 1
Requirements
- Player Level: 360
- 100,000 Beli
Buffs
- Damage Buff: +2.5%
Level 2
Requirements
- Haki Attacks (while active): 5,000
Buffs
- Damage Buff: +5%
Level 3
Requirements
- Haki Attacks (while active): 20,000
Buffs
- Damage Buff: +7.5%
Level 4
Requirements
- Haki Attacks (while active): 50,000
Buffs
- Damage Buff: +10%
Level 5
Requirements
- Haki Attacks (while active): 100,000
- Hits Taken: 1,000
- 200 Gems
- Quest: Complete the Armament Haki Expert trial on Flower Captain Island (Sea 2)
Buffs
- Damage Buff: +15%
- Damage Resistance: +10%
Max Level Quest (Level 5)
Location
Flower Captain Island (Flower Capital), Sea 2 — World Map
NPC
Armament Haki Expert
Unlock Condition: Land 100,000 hits with Armament Haki toggled on
Objective: Absorb 1,000 enemy hits
During the expert's trial, take 1,000 hits from enemies to finish the durability check.
Objective: Pay 200 Gems
Pay the Armament Haki Expert 200 Gems to cap Buso at Level 5 (+15% damage, +10% damage resistance).