Kaiju No. 8 The Game — Boss Fight Guide: All Raid Boss Mechanics & Team Strategies

Introduction

Endgame boss fights in Kaiju No. 8 The Game test every system you’ve mastered through the story. From the plate-break (PLT) mechanic to Ultimate timing, team synergy, and elemental coverage — successful bossing requires preparation and execution.

This guide covers everything you need to know to clear endgame boss content consistently.

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Boss Raid System Overview

Unlocked after Chapter 8, the Boss Raid system features weekly rotating encounters with escalating difficulty tiers:

Tier	Recommended Level	Rewards
Beginner	30	Proof of Valor ×30, 3★ Uniparts
Intermediate	45	Proof of Valor ×60, 4★ Uniparts
Advanced	55	Proof of Valor ×90, 5★ Uniparts
Expert	65	Proof of Valor ×150, 5★ Uniparts, Rare Crafting Mats

Two raid types rotate weekly:

• Giant-Class Raid — Single enormous Kaiju with high HP, 6-8 plates, multiple phases, and devastating AoE attacks
• Horde Raid — Waves of 3-5 smaller Kaiju with lower individual HP but dangerous combined pressure

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Core Boss Mechanics

Plate Break (PLT) System

Every boss has a set of armor plates that must be broken before you can deal meaningful damage:

Plate Color	Weak To	Effective Characters
Red	Blunt	Aoi Kaguragi, Kaiju No. 8, Suited
Blue	Slash	Kikoru Shinomiya, Soshiro Hoshina, Hikari Shinomiya
Yellow	Shot	Mina Ashiro, Rin Shinonome, Reno Ichikawa
Green	Elemental	Reno (Ice), Akari Minase (Fire), Iharu Furuhashi (Lightning)

Pro tip: Check the raid preview 24 hours before reset to see plate colors. Build your team to cover at least 3 of the 4 plate colors. A team that can’t break plates will time out regardless of DPS.

Core Exposed Phase

When all plates break, the boss enters Core Exposed state:

• Takes 50% increased damage from all sources
• Cannot act (stunned) for 1-2 turns
• DEF PEN Rate from abilities doubles
• This is your burst window — save Ultimates for this moment

Boss Phases

Most Giant-Class bosses have 2-3 phases triggered at HP thresholds (75%, 50%, 25%):

• Phase transitions instantly regenerate 2-3 plates
• Boss gains a new mechanic or attack pattern each phase
• Some bosses gain damage reduction or enrage timers in later phases

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Giant-Class Boss Profiles

Yojimbe (Single-Target Burst Check)

Attribute	Details
Plates	6 (2 Red, 2 Blue, 2 Yellow)
Weakness	Slash > Shot > Blunt
Mechanics	Phase 2: Gains Taunt that forces target switch. Phase 3: Charged AoE that must be interrupted by breaking remaining plates
Recommended Team	Ultimate Burst archetype — Kikoru Shinomiya (main DPS), Chester Lochburn (Ultimate battery), Haruichi Izumo (buffs), Isao Shinomiya (tank)

Strategy: Break Slash plates first with Kikoru. Save all Ultimates for Core Exposed windows. In Phase 2, the Taunt forces your tank to eat heavy damage — use Isao or Aoi Kaguragi with Bovine-Type uniparts. Phase 3 requires fast plate breaking to interrupt the charge attack.

Honju (Elemental Resistance Test)

Attribute	Details
Plates	8 (2 of each color)
Weakness	Elemental > All
Mechanics	Phase 1: Elemental shields reduce non-matching damage by 80%. Phase 2: Summons minions that heal the boss. Phase 3: Massive AoE at 25% HP
Recommended Team	Fire DoT archetype — Akari Minase (Festive Christmas), Jura Igarashi, Wang Meixing, Reno Ichikawa

Strategy: Elemental damage is mandatory. Akari Minase with AR-Xmas25 weapon applies Burn that bypasses shields. Jura Igarashi’s Afterburn doubles DoT tick rate. Phase 2 minions must be AoE’d down quickly — Iharu Furuhashi’s Shock Lightning is excellent here. Pop defensive buffs before Phase 3’s AoE.

Orochi (Multi-Target DPS Race)

Attribute	Details
Plates	4 per head (3 heads = 12 total)
Weakness	AoE > Single Target
Mechanics	Heads regenerate if not killed simultaneously. AoE breath attacks hit entire party
Recommended Team	AoE Wave Clear archetype — Gen Narumi, Hikari Shinomiya, Suited, Soshiro Hoshina

Strategy: This is a DPS race — all three heads must die within 2 turns of each other or they revive. Gen Narumi with GS-Takamimusubi deals excellent AoE Slash/Shot damage. Wolf-Type uniparts (AoE DMG bonus) are BiS here. Track each head’s HP and hold AoE skills until all heads are low enough to finish together.

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Horde Raid Strategies

Horde raids feature 4-5 waves of 3-5 Kaiju each. Key differences from Giant-Class:

• Faster pace — Waves spawn every 2 turns
• No core exposed — Plate breaks just remove individual Kaiju’s armor
• Survivability priority — Constant incoming damage requires healing or shields
• AoE kings — Gen Narumi, Suited, and Soshiro Hoshina excel here

Recommended Horde Team

Slot	Character	Role
DPS	Gen Narumi (Japan’s Strongest Combatant)	AoE Slash/Shot with GS-Takamimusubi
Sub-DPS	Soshiro Hoshina (Hoshina-Style)	AoE Slash, snowball potential
Support	Haruichi Izumo (Calculated Choice)	ATK buffs, SP regeneration
Flex	Suited (Unbridled Curiosity)	Extra Attacks, Mark synergy

Strategy: Frontload AoE damage to clear waves before they can act. Gen Narumi’s GS-Takamimusubi stacks ATK on PLT destruction — use Combat Skill immediately each wave. Suited’s Extra Attacks proc frequently against multiple targets, generating enormous total damage.

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Uniparts Setup for Bossing

Best Sets by Boss Type

Boss Type	Best Set	Second Best
Giant-Class (DPS)	Lizard-Type β	Fungal-Type
Giant-Class (Support/Tank)	Wyvern-Type β	Bovine-Type
Horde (DPS)	Wolf-Type	Caudata-Type
Elemental Weak Boss	Spider-Type	Fungal-Type β

Stat Priorities

DPS characters:

• Arms: ATK% > flat ATK
• Body: CRIT DMG > CRIT Rate
• Legs: Elemental DMG% > SPD

Support/Tank characters:

• Arms: HP% or DEF% > flat
• Body: Effect Hit Rate (debuffer) or Ultimate Charge (battery)
• Legs: SPD > Effect RES

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Beginner Boss Progression Path

1. Chapters 1-4: No boss raids yet. Focus on story and leveling your main team
2. Chapters 5-7: Unlock Uniparts — farm Beginner difficulty for 3★ sets to equip your team
3. Chapter 8: Unlock Boss Raids. Start with Beginner difficulty to learn mechanics
4. Player Level 45+: Move to Intermediate. Start equipping 4★ uniparts
5. Player Level 55+: Advanced raids. Target specific uniparts sets
6. Player Level 65+: Expert raids. Optimize substats and awakenings

Refer to the Beginner’s Guide for early progression tips and the Best Squad Compositions for team templates for each boss type.

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Daily Boss Routine

Activity	Stamina	Priority
Weekly raid bonus (first 3 clears)	60	★★★★★
Daily raid clear	30	★★★★
Event raids (limited time)	Varies	★★★★★
Story boss farming (materials)	20	★★★

Always clear the weekly bonus raids first. After that, farm the highest difficulty tier you can clear consistently. Event raids have limited-time rewards and should take priority when active.

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Bookmark this guide and check back as we update boss strategies for new raid rotations. The endgame meta evolves with each new character release and balance patch.