Important

Account Linking Recommended

Gacha

Kikoru Shinomiya Pickup Gacha Now Available!

Event

[Updated] Mop-Up Operation Now Available!

Event

[Updated] Raid Battle: Kaiju No. 1 Now Available!

Update

[Updated] Data Update & Event Preview

Event

Training: Kaijumite—2x Rewards Campaign Now Available!

Event

Kaiju Rush Now Available!

Known Issue

[Updated] Regarding Currently Confirmed Issues

Gacha

Soshiro Hoshina Pickup Gacha Now Available!

Event

Special Event [The Weapon Within] Now Available!

Known Issue

[Updated] Regarding the Issue with Unipart R&D

Event

Large Conquest: Absolute Perimeter Now Available!

Event

Fierce Battle Area (Limited): Incremental Grandeur Now Available!

Gacha

[Limited] Wang Meixing Pickup Gacha Now Available!

Gacha

[Limited] Sagan Shinomiya Pickup Gacha Rerun Now Available!

Gacha

Reno Ichikawa Pickup Gacha Rerun Now Available!

Event

Main Story Ch. 7 Release & Celebration Event

News

Defense Force Pass Now Available!

News

Monthly Items Reset

Event

Fierce Battle Area (Permanent): Tachikawa New High Difficulty Stages!

Update

[Updated] Version 1.4.2 Update Now Live

Update

Version 1.4.1 Update Now Live

Update

Version 1.4.0 Update Now Live

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!

Known Issue

[Updated] Regarding Issue with Fierce Battle Area

Event

New Training: Caudata-Type α Added!

News

[Updated] Version 1.2.2 Update Now Live

Event

New Training: Armored-Type α Added!

News

PC (Steam®) Version Now Available!

News

Version 1.2.0 Update Now Live

Important

Official Release & Pre-Registration Rewards

News

The KAIJU NO. 8 THE GAME Web Store

News

Release Celebration Items—Value Items Now On Sale!

Gacha

Kikoru Shinomiya Pickup Gacha Now Available!

Event

[Updated] Mop-Up Operation Now Available!

Event

[Updated] Raid Battle: Kaiju No. 1 Now Available!

Event

Training: Kaijumite—2x Rewards Campaign Now Available!

Event

Kaiju Rush Now Available!

Gacha

Soshiro Hoshina Pickup Gacha Now Available!

Event

Special Event [The Weapon Within] Now Available!

Event

Large Conquest: Absolute Perimeter Now Available!

Event

Fierce Battle Area (Limited): Incremental Grandeur Now Available!

Gacha

[Limited] Wang Meixing Pickup Gacha Now Available!

Gacha

[Limited] Sagan Shinomiya Pickup Gacha Rerun Now Available!

Gacha

Reno Ichikawa Pickup Gacha Rerun Now Available!

Event

Main Story Ch. 7 Release & Celebration Event

News

Defense Force Pass Now Available!

News

Monthly Items Reset

Event

Fierce Battle Area (Permanent): Tachikawa New High Difficulty Stages!

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!

News

[Updated] Version 1.2.2 Update Now Live

Event

New Training: Armored-Type α Added!

News

PC (Steam®) Version Now Available!

News

Version 1.2.0 Update Now Live

News

The KAIJU NO. 8 THE GAME Web Store

News

Release Celebration Items—Value Items Now On Sale!

Important

Account Linking Recommended

Update

[Updated] Data Update & Event Preview

Known Issue

[Updated] Regarding Currently Confirmed Issues

Known Issue

[Updated] Regarding the Issue with Unipart R&D

Update

[Updated] Version 1.4.2 Update Now Live

Update

Version 1.4.1 Update Now Live

Update

Version 1.4.0 Update Now Live

Known Issue

[Updated] Regarding Issue with Fierce Battle Area

Important

Official Release & Pre-Registration Rewards

2026-01-22T07:45:00Z

[Updated] Mop-Up Operation Now Available!

Overview

Following the defeat of Kaiju No. 1, a massive swarm of Kaiju has appeared.

Commencing the Mop-Up Operation.

Earn awesome rewards by defeating the Yoju as they put up a desperate final resistance!

[Updated 2026-01-22T07:45:00Z]

This event will remain available until all Kaiju have been defeated or until 2026-02-07T03:00:00Z.

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 [Lizard-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

  • 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.