Kokushibo (Moon Slayer Boss)
Kokushibo is the key endgame boss for unlocking the Moon Slayer fighting style. Summoned on Boss Island using 1x Upper Seal + 700,000 Money + 700 Gems. Upper Seals drop from Shinjuku, Lawless, and Ninja Island enemies. Drops Moon Crest (0.3% — required for Moon Slayer unlock), Demon Remnant (8.91%), Lunar Essence (3.08%), and Crescent Shard (0.70%). Added in the Moon Update (March 31, 2026). Level 12,000+ recommended.
Kokushibo (Moon Slayer Boss)
Endgame Islands
- Location
- Boss Island
- Level Required
- 12,000
- Respawn Time
- Summon only (1x Upper Seal + 700,000 Money + 700 Gems)
- HP
- 1,250,000,000
Kokushibo (Moon Slayer Boss) Stats — HP, Level & Difficulty
| Stat | Value | Notes |
|---|---|---|
| Health | 1,250,000,000 | - |
| Level | 12,000 | - |
| Sea | Endgame Islands | - |
| Difficulty | Extreme | - |
| Respawn Time | Summon only (1x Upper Seal + 700,000 Money + 700 Gems) | - |
| Drop Count | 4 items | - |
What does Kokushibo (Moon Slayer Boss) drop?
Kokushibo (Moon Slayer Boss) drops 4 items. The rarest drops are Moon Crest and Crescent Shard. Farm Kokushibo (Moon Slayer Boss) consistently to accumulate materials for crafting and progression.
| Item | Type | Drop Rate | Rarity |
|---|---|---|---|
| Demon Remnant | Crafting Material | 8.91% | Rare |
| Lunar Essence | Crafting Material | 3.08% | Rare |
| Crescent Shard | Crafting Material | 0.7% | Very Rare |
| Moon Crest | Crafting Material | 0.3% | Very Rare |
How to beat Kokushibo (Moon Slayer Boss)
Kokushibo (Moon Slayer Boss) is one of the hardest bosses in Sailor Piece. Only attempt with a fully optimized endgame build. Solo runs are extremely punishing — a coordinated group is strongly recommended. Make sure your stats, race, and accessories are all maxed before engaging.
Recommended Stats
- ‣Melee / Sword stat: 2500+ for reliable damage
- ‣Fruit stat: 2500+ if running a Devil Fruit build
- ‣Defense / HP accessories recommended for survival
Where to find Kokushibo (Moon Slayer Boss) (Location & Respawn)
Kokushibo (Moon Slayer Boss) is located at Boss Island, in the Endgame Islands zone. This is an endgame zone. You will need high-level stats and gear before travelling here.
Kokushibo (Moon Slayer Boss) respawns approximately every Summon only (1x Upper Seal + 700,000 Money + 700 Gems). If you arrive and the boss is not present, wait at the spawn location or switch to a less populated server. Many players farm this boss repeatedly for drop materials, so competition for kills can be high on busy servers.
Recommended Level: 12,000+
Players below level 12,000 will deal significantly reduced damage and may struggle to survive the encounter. Reach at least 13,200 for a comfortable fight.
Quick Reference Cards
At a Glance
Quick Overview
Kokushibo (Moon Slayer Boss)
S+ TierLevel
12000
HP
1,250,000,000
Difficulty
Extreme
Respawn
Summon only (1x Upper Seal + 700,000 Money + 700 Gems)
Kokushibo is the key endgame boss for unlocking the Moon Slayer fighting style. ...
Tier Position
Ranked #11 of 32 in Bosses
Kokushibo (Moon Slayer Boss) is in S+ Tier
Drop Table — Kokushibo (Moon Slayer Boss)
Drop rates are approximate and subject to game updates
Kokushibo (Moon Slayer Boss) Update History
Patch History
- Moon UpdateLatest
- New boss: Kokushibo (Moon Slayer Boss) on Boss Island. Summoned with 1x Upper Seal + 700,000 Money + 700 Gems. Upper Seal drops from Shinjuku/Lawless/Ninja Island. Drops: Demon Remnant (~26%), Lunar Essence (~9%), Crescent Shard (~2%), Moon Crest (~1%). ⚠️ Alx confirmed Kokushibo will be buffed (2026-04-01 06:07 UTC) — stats may change. Source: Discord #update-logs (2026-03-31) + single-source deltias drop rates (pending verification).
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Combat Tips
- ‣Use Armament Haki to deal full damage
- ‣Bring a fruit build for maximum damage output
- ‣Team up for this boss — solo is extremely difficult
- ‣Respawns every Summon only (1x Upper Seal + 700,000 Money + 700 Gems)
Location
Last updated: 2026-05-10
Recommended Builds
Boss Synergies
Best Pairings & Synergies
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