All Bosses Kaizen Guide – Drops, Locations, and Respawn Times

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.