GS-Oyamatsumi is a 5-Star Gunsword weapon in Kaiju No. 8 The Game (K8 The Game). This guide covers its stats, effect, and recommended characters.
Table of Contents
GS-Oyamatsumi Stats & Effect

| Rarity | 5★ |
|---|---|
| Weapon Type | Gunsword |
Effect
| CRIT DMG (%) +48% - Each time the equipped unit attacks a Core Exposed Kaiju, applies DEF PEN Rate +4% to the equipped unit. Max 3 stack(s). - After the equipped unit activates Combat Skill, applies Shot DMG dealt +15% (2 turn(s)) to the equipped unit. |
Base Stats
| HP | ATK | DEF |
|---|---|---|
| 60 | 40 | 26 |
Recommended Characters for GS-Oyamatsumi
The Best Character is Gen (Future Sight)
| Character | Evaluation |
|---|---|
Gen Narumi | - Has 2 Attributes: Slash and Shot - Can fight while increasing his own DMG - Recovers SP with his Combat Skill against a Core Exposed Kaiju - Easy to use his Ultimate, and can randomly break Plates with its Seen Through state |
The best character for GS-Oyamatsumi is Gen Narumi (Future Sight). The weapon boosts CRIT DMG, so pair it with Uniparts and Supporters that enhance his CRIT Rate for maximum damage.
How to Get GS-Oyamatsumi
How to Get
- Gacha
Available From Gacha
GS-Oyamatsumi can be obtained from the Gacha.
Kaiju 8 The Game Related Guides

5-Star Weapons
4-Star Weapons
| Obtained from Gacha | |||
|---|---|---|---|
AR-Lynx 75 | PS-Dobermann 52 | Ax-Mantis 21 | AR-Narwhal 59 |
AR-Octopus 58 | AR-Panther 33 | AR-Honeybee 84 | T-Tiger 15 |
SW-Fox 48 | SW-Crow 93 | GS-Orca 70 | GG-Squirrel 02 |
Fs-Grizzly 83 | AR-Squid 62 | Lc-Rhinoceros 01 | HG-Xmas25 |
S-Silky Shark 13 | |||
| Obtained from Beginner's Guide | |||
HG-Beetle 15 | |||
| Obtained from Events | |||
AR-Hound 64 | Fs-Gaur 28 | Ax‐Bison 91 | |