Important

Account Linking Recommended

News

Official Social Media Accounts for KAIJU NO. 8 THE GAME

News

Version 1.8.1 Update Now Live

Known Issue

[Updated] Regarding Currently Confirmed Issues

Gacha

[Limited] Haruichi Izumo Gacha Now Available!

Event

Main Story Ch. 10 Release & Celebration Event

Event

Training: Defense Force Manual—2x Rewards Campaign Now Available!

News

Defense Force Pass Now Available! Introducing Weapon Supply Box III!

News

Monthly Items Reset

Update

Version 1.8.0 Update Now Live

Event

Kaiju Rush Now Available!

Gacha

[Limited] Hikari Shinomiya Pickup Gacha Rerun Now Available!

Event

Mop-Up Operation Now Available!

Event

[Updated] Raid Battle: Kaiju No. 2 Now Available!

Gacha

[Limited] Suited Pickup Gacha Now Available!

Event

Large Conquest: All-or-Nothing Barrage Now Available!

Event

Fierce Battle Area (Limited): Vortex of Gleaming Edge Now Available!

News

New Training: Wolf-Type Kaiju α Added!

News

New Trainings: Wyvern-Type Kaiju β/Kaiju No. 6 Added!

Event

THE GAME Missions Now Available!

Event

Expedition HARD Mode Added!

Event

New Training: Fungal-Type β Added!

News

Changes to Weekly Limit and Stamina for Identified Kaiju Neutralization

News

New Shop Arrival: Defense Force Support Special Pack!

Event

New Training: Caudata-Type α Added!

Event

New Training: Armored-Type α Added!

News

PC (Steam®) Version Now Available!

Important

Official Release & Pre-Registration Rewards

News

The KAIJU NO. 8 THE GAME Web Store

News

Release Celebration Items—Value Items Now On Sale!

News

Official Social Media Accounts for KAIJU NO. 8 THE GAME

News

Version 1.8.1 Update Now Live

Gacha

[Limited] Haruichi Izumo Gacha Now Available!

Event

Main Story Ch. 10 Release & Celebration Event

Event

Training: Defense Force Manual—2x Rewards Campaign Now Available!

News

Defense Force Pass Now Available! Introducing Weapon Supply Box III!

News

Monthly Items Reset

Event

Kaiju Rush Now Available!

Gacha

[Limited] Hikari Shinomiya Pickup Gacha Rerun Now Available!

Event

Mop-Up Operation Now Available!

Event

[Updated] Raid Battle: Kaiju No. 2 Now Available!

Gacha

[Limited] Suited Pickup Gacha Now Available!

Event

Large Conquest: All-or-Nothing Barrage Now Available!

Event

Fierce Battle Area (Limited): Vortex of Gleaming Edge Now Available!

News

New Training: Wolf-Type Kaiju α Added!

News

New Trainings: Wyvern-Type Kaiju β/Kaiju No. 6 Added!

Event

THE GAME Missions Now Available!

Event

Expedition HARD Mode Added!

Event

New Training: Fungal-Type β Added!

News

Changes to Weekly Limit and Stamina for Identified Kaiju Neutralization

News

New Shop Arrival: Defense Force Support Special Pack!

Event

New Training: Caudata-Type α Added!

Event

New Training: Armored-Type α Added!

News

PC (Steam®) Version Now Available!

News

The KAIJU NO. 8 THE GAME Web Store

News

Release Celebration Items—Value Items Now On Sale!

Important

Account Linking Recommended

Known Issue

[Updated] Regarding Currently Confirmed Issues

Update

Version 1.8.0 Update Now Live

Important

Official Release & Pre-Registration Rewards

2026-01-06T07:00:00Z

[Updated] Mop-Up Operation Now Available!

Overview

[Updated 2026-01-06T07:00:00Z]

Due to the launch of upcoming events, this event will end on 2026-01-09T03:00:00Z.

Please note that once the event ends, Mop-Up Operation Permits will be recalled and cannot be carried over to future events. We appreciate your understanding.


Following the defeat of Kaiju No. 10, a massive swarm of Preondactyl (Yoju of Kaiju No. 10) has appeared.

Commencing the Mop-Up Operation.

Defeat the Yoju as they put up a desperate resistance to earn awesome rewards!

Event Description

  • The Mop-Up Operation is a competitive event where all players work to neutralize a massive number of Kaiju.
  • The Mop-Up Operation consists of 5 stages, and you can challenge each stage until the remaining number of Kaiju reaches 0.
  • Use specific permits to take part in Mop-Up Operation.¹ ²
  • Each battle ends once 5 rounds have elapsed. Defeat as many Kaiju as possible within 5 rounds.
  • Each of the 5 stages offers different rewards.
  • The more Kaiju you defeat in a single battle, the greater the rewards you obtain.
  • In every stage, there is a rare chance to obtain ★5 Unimaterial [Wyvern-Type Kaiju α], which guarantees a ★5 Unipart when used during development.
  • Skipping is not available for Mop-Up Operation.
  • The event ends once the remaining number of Kaiju in all stages reaches 0.

¹ During the availability period of the Mop-Up Operation, up to 5 Mop-Up Operation Permits can be claimed on the event screen every 4:00 AM JST. If you have unused Mop-Up Operation Permits at 4:00 AM JST, you can claim new ones to reach a total of 5.

² Mop-Up Operation Permits can also be replenished using Dimensional Crystal x20.

Important

  • This event will remain available until all Kaiju have been defeated.
  • The Mop-Up Operation will end 24 hours after all Kaiju have been defeated and the stages conclude.
  • If a Mop-Up Operation battle ends in defeat, retreat, or suspension, rewards will still be granted based on the number of Kaiju defeated up until that point. However, Mop-Up Operation Permits will not be refunded.