Boss fights are one of the main ways to grow stronger in Kaizen. Besides giving large amounts of XP and Mastery XP, bosses also drop accessories, materials, and weapons that are important for upgrading your character. Knowing where each boss spawns and what they can drop makes farming much more efficient.
Kaizen features two main boss categories: Story Bosses and World Bosses. Story Bosses have fixed spawn points and are tied to quests, making them easier to track. World Bosses are rarer, appear in specific regions, and follow longer respawn timers.
All Story Bosses in Kaizen
Story Bosses are part of the main progression path. They always reward XP, Mastery XP, and a Boss Chest, along with chances for extra items.
Cathy — Jujutsu High Headquarters
Drops:
- XP and Mastery XP
- Boss Chest
- Furr Coat (Accessory) — 30% chance
Raiken — School Track & Field
Drops:
- XP and Mastery XP
- Boss Chest
- Brace Knuckles (Accessory) — 70% chance
Grasshopper — Lotusgrave Swamps
Drops:
- XP and Mastery XP
- Boss Chest
- Grasshopper Wings (Accessory) — 10% chance
- Grasshopper Core (Material) — 42.5% chance
Shroom Chief — Mizuka Outskirts
Drops:
- XP and Mastery XP
- Boss Chest
- Shroom Chief Core (Material) — 45% chance
- Mushroom Gauntlets (Accessory) — 10% chance
Lizard — Mizuka Outskirts
Drops:
- XP and Mastery XP
- Boss Chest
- Lizard Core (Material) — 25% chance
- Lizard Furr Coat (Accessory) — 10% chance
Cyclops — Mizuka Mines
Drops:
- XP and Mastery XP
- Boss Chest
- Cyclops Core (Material) — 25% chance
- Eye Pendant (Accessory) — 8% chance
Frog King — Lotusgrave Cavern
Drops:
- XP and Mastery XP
- Boss Chest
- Frog King Core (Material) — 35% chance
- Frog King Crown (Material) — 3.1% chance
- Frog Crown (Accessory) — 9.2% chance
Cave Mole — Cursed Caverns
Drops:
- XP and Mastery XP
- Boss Chest
- Cave Mole Core (Material) — 45% chance
Frostbound Titan — Frozen Peak
Drops:
- XP and Mastery XP
- Boss Chest
- Frostbound Titan Core (Material) — 45% chance
- Frost Pauldron (Accessory) — 10% chance
Toxic Waste Curse — Toxic Waste Room
Drops:
- XP and Mastery XP
- Boss Chest
- Toxic Waste Core (Material) — 45% chance
- Jaw Mask (Accessory) — 8.4% chance
Finger Bearer — The Bearer’s Hollow
Drops:
- XP and Mastery XP
- Boss Chest
- Finger Bearer Core (Material) — 20% chance
- Cursed Finger #1 (Material) — 2.6% chance
- Red Claws (Accessory) — 6.2% chance
Grin Curse — Shibuya
Drops:
- XP and Mastery XP
- Boss Chest
- Prayer’s Beads (Accessory) — 5.3% chance
Ironclad Gnasher — Shibuya
Drops:
- 149,700 XP
- Mastery XP
- Boss Chest
- Ironclad Gnasher Core (Material) — 45% chance
- Ironclad Gauntlet (Accessory) — 4.5% chance
Story Boss Respawn: Most Story Bosses return within 1–5 minutes. Bosses with rarer loot, such as Grasshopper and Finger Bearer, usually take closer to 5 minutes to reappear, while easier bosses respawn much faster.
All World Bosses in Kaizen
World Bosses are stronger enemies with better rewards, including weapons and rare materials.
Uraume — Frozen Peak
Drops:
- XP and Mastery XP
- Boss Chest
- Frost Fangs (Weapon)
- Uraume Core (Material)
Eso — Jujutsu Headquarters
Drops:
- XP and Mastery XP
- Boss Chest
- Blood Scythe (Weapon)
- Eso Core (Material)
Gojo — Horobi Village
Drops:
- XP and Mastery XP
- Boss Chest
- Binding Vow Spins
- Six Eyes Essence (Material)
- Gojo Headband (Accessory)
Sukuna — Shibuya
Drops:
- XP and Mastery XP
- Boss Chest
- Binding Vow Spins
- Cursed Finger #3 (Material)
- Malevolent Flame Pauldron (Accessory)
Itadori — Trial of Absolute Focus
Drops:
- XP and Mastery XP
- Boss Chest
- Binding Vow Spins
- Black Flash Essence (Material)
- Demon Arms (Accessory)
World Boss Respawn: World Bosses respawn about 10 minutes after defeat. Some, like Itadori and Eso, have very low spawn chances, so players often switch servers to find them faster.
Farming Tips for Kaizen Bosses
If you’re farming for materials, focus on bosses with shorter respawn timers and useful crafting drops. For rare accessories and weapons, World Bosses are the main targets, but expect competition and longer wait times. Rotating between nearby Story Bosses while waiting for a World Boss to respawn is one of the most efficient grinding methods.
Boss farming in Kaizen is a core part of progression, especially when you’re chasing rare accessories and upgrade materials. Learning each boss’s location and respawn pattern helps you plan efficient farming routes and avoid wasting time. By targeting the bosses that drop the items you actually need, you can level faster and build a much stronger character without unnecessary grinding.