The Sailor Piece skill tree is one of the most impactful permanent progression systems in the game, and most players either unlock it too late or spend points in the wrong order. A fully maxed damage tree alone adds 25% to every attack from every source, melee, swords, and Devil Fruits alike.
This guide covers exactly how to unlock it, where the NPC is, the fastest way to farm Skill Points, complete upgrade costs for all five trees, and the priority order that accelerates your grind from the very first point spent.
How to Unlock the Sailor Piece Skill Tree
Requirements:
- Level 7,000 or above
- 1,000 Gems
Slime Island is accessible to all players with no level gate, but the Skill Tree NPC will not interact with you until you hit Level 7,000 exactly. The Gems cost is a one-time permanent unlock.
How to get there:
- Open any Teleport Portal and select Slime Island
- From the spawn point, head toward the wooden merchant stalls at the center of the island, and look for the cobblestone house on the central street.
- Find the Skill Tree NPC, black outfit, black hat, standing at the entrance of the house, facing the Slime Key Crafter NPC
- Interact, pay 1,000 Gems, and the Sailor Piece skill tree is permanently unlocked.
Critical detail: The skill tree UI does not appear in your game menu. You must return to this NPC every single time you want to view or spend Skill Points. There is no shortcut to bookmarking Slime Island as a regular stop in your rotation.
How to Farm Skill Points Fast
Every 250 enemies defeated anywhere in the game earns you 1 Skill Point. Both mobs and bosses count, but bosses are dramatically inefficient since they take far longer to kill and still only count as one enemy.
The math: Maxing all five trees requires 324 Skill Points total, meaning 81,000 enemy kills. Starting early is the single most important thing in every session at Level 7,000 compounds.
Best Farming Methods:
Method 1 Shinjuku Showdown + Quake Fruit C move (fastest) The Quake Fruit C move fires a wide AoE wave that one-shots the mobs in Shinjuku Showdown, clearing approximately 10 enemies per use on a 10-second cooldown. That translates to roughly 250 kills every 4 to 5 minutes, one Skill Point per session of consistent play. This is the most cited fastest method across the community.
Method 2: AFK mob farming on high-density islands. Enable Auto Skills and position yourself in the center of a high-density spawn area. Lawless Island Arena Fighters and Ninja Island Ninjas both respawn quickly and have enough density to clear 250 kills passively in a single AFK session. Enable Auto Haki alongside Auto Skills for maximum kill speed. Leave running between active play sessions.
Method 3: Manipulator Sword or Atomic Sword AoE clearing. Both weapons carry wide AoE hit patterns that clear mob clusters efficiently without a specific fruit requirement. Use either on any high-density island with Auto Skills active for consistent passive Skill Point accumulation.
Key Rules for Efficiency:
- Never chase individual bosses for Skill Points; they count as one kill and take minutes
- Private servers eliminate competition for mob kills and increase your personal kill count per spawn cycle
- Start farming Skill Points immediately at Level 7,000; every delay is thousands of kills you never get back
Full Sailor Piece Skill Tree Complete Upgrade Costs and Stats
Five trees, five levels each, purchased in order. You cannot skip levels.
Damage% (Priority 1)
Damage% first always. Every kill you make after investing in Damage% is faster than the kill before it. Faster kills mean faster Skill Point accumulation. Spending 59 SP on Damage% first creates a compounding effect that shortens the entire remaining grind, particularly relevant given 81,000 kills are required to max everything. Every other tree is slower to return a value.
| Level | Cost | Boost |
| 1 | 3 SP | +5% damage |
| 2 | 6 SP | +5% damage |
| 3 | 10 SP | +5% damage |
| 4 | 15 SP | +5% damage |
| 5 | 25 SP | +5% damage |
| Total | 59 SP | +25% damage |
Crit Damage (Priority 2)
Crit Damage second Crit Damage multiplies the value of every critical hit for the rest of your grind. Stacks directly with Damage%, the two together produce noticeably higher output than either alone. At only 59 SP total, it is efficiently reached after Damage%.
| Level | Cost | Boost |
| 1 | 3 SP | +3% crit damage |
| 2 | 6 SP | +3% crit damage |
| 3 | 10 SP | +3% crit damage |
| 4 | 15 SP | +3% crit damage |
| 5 | 25 SP | +3% crit damage |
| Total | 59 SP | +15% crit damage |
Crit Chance (Priority 3)
Crit Chance third. More crits mean more Crit Damage procs. Unlock after Crit Damageg,e so the multiplier exists before you increase the frequency. Same cost as Damage% and Crit Damage at 59 SP.
| Level | Cost | Boost |
| 1 | 3 SP | +1% crit chance |
| 2 | 6 SP | +1% crit chance |
| 3 | 10 SP | +1% crit chance |
| 4 | 15 SP | +1% crit chance |
| 5 | 25 SP | +1% crit chance |
| Total | 59 SP | +5% crit chance |
HP% (Priority 4)
HP% fourth Survivability becomes relevant at higher difficulty content. At 48 SP total, HP% is the cheapest tree to max and delivers +37.5% HP meaningful for boss farming and Infinite Tower floors where incoming damage scales heavily.
| Level | Cost | Boost |
| 1 | 2 SP | +7.5% HP |
| 2 | 5 SP | +7.5% HP |
| 3 | 8 SP | +7.5% HP |
| 4 | 13 SP | +7.5% HP |
| 5 | 20 SP | +7.5% HP |
| Total | 48 SP | +37.5% HP |
Luck ( Priority 5)
Luck last Luck costs 265 SP more than all the other four trees combined. The +25% drop rate improvement is real and valuable for farming Race Rerolls, Upper Seals, and rare drops, but its extreme cost makes it a late investment. Start allocating toward Luck only after Damage%, Crit Damage, and Crit Chance are fully maxed.
| Level | Cost | Boost |
| 1 | 15 SP | +5% luck |
| 2 | 25 SP | +5% luck |
| 3 | 50 SP | +5% luck |
| 4 | 75 SP | +5% luck |
| 5 | 100 SP | +5% luck |
| Total | 265 SP | +25% luck |
Total SP to max everything: 490 SP, approximately 122,500 enemies. Buy Sailor Piece items on a reliable marketplace if you need Gems or Skill Points to bridge the gap directly.
Skill Tree Synergies With Other Systems
The Sailor Piece skill tree stacks additively with every other build system runes, traits, clans, races, and artifacts, all apply on top of skill tree bonuses. Damage% from the skill tree stacks with Warlord's +80% damage race bonus, Upper Clan's +40% damage passive, and Emperor Trait's 2.30x multiplier simultaneously. The combined effect is why endgame players prioritize reaching full Damage% tree as early as possible, as it multiplies the value of every other system in the build.
For farming builds specifically, the Luck tree paired with Kitsune race, Monarch Clan, and Fortune Rune creates the highest possible combined drop rate in the game, worth targeting once your damage output is established.
FAQs
Should I unlock the Sailor Piece skill tree immediately at Level 7,000?
Yes, without exception. The kill counter runs from the moment you unlock it, and every session before unlocking, Skill Points are permanently lost. The 1,000 Gem cost is recovered quickly from normal play. Do not delay this unlock for any reason.
Does the Luck tree affect Race Reroll drop rates from enemies?
Yes directly. The +25% Luck bonus from the skill tree stacks with race luck bonuses and clan drop chance passives. Kitsune race at +25% Luck Multi, combined with the max Luck tree and Monarch Clan, produces the highest combined farming efficiency available. Worth targeting specifically if Race Rerolls, Upper Seals, or Power Shards are your active farming goals.
How long does it realistically take to max all five Sailor Piece skill trees?
At one Skill Point per 250 kills and 490 total SP required, you need 122,500 kills. With the Shinjuku Showdown and Quake Fruit method producing approximately 250 kills per 4 to 5 minutes, a focused session generates roughly 12 to 15 Skill Points per hour.
More Sailor Piece Guides:
New to the sailor piece? Check our [Sailor Piece Beginner Guide].
Need free Gems for your grind? Grab the latest [Sailor Piece Codes]f
