Gen Narumi (Japan's Strongest Santa) is a 5-Star character in Kaiju No. 8 The Game (K8 The Game). Learn about skill upgrade priority, best build, and team comps.
Table of Contents
| Other Gen Narumi | ||
|---|---|---|
Japan's Strongest Combatant | Future Sight | Japan's Strongest Santa |
Basic Info & Tier for Gen Narumi (Japan's Strongest Santa)
![]() | Rarity | 5★ |
|---|---|---|
| Type | Slash Ice | |
| Inflicted Ailment | - | |
| Role | Attacker | |
| How to Get | Gacha |
Gen Narumi [Japan's Strongest Santa] is a dual-attribute Slash and Ice attacker. His Combat Skill costs 2 SP but delivers a high-multiplier Blast Attack with both Attributes. His Ultimate buffs himself, advances his Action Order, and restores 2 SP, helping offset his high SP consumption so he can keep dishing out damage.
Tier & Rating
| Overall Tier | Reroll Tier |
|---|---|
![]() ▶ Character Tier List | ![]() ▶ Reroll Tier List |
User Score
Pros & Cons for Gen Narumi (Japan's Strongest Santa)
Dual-Attribute Slash/Ice Attacker
Gen is an Attacker who wields both Slash and Ice attributes. He can remove both Physical and Elemental Plates, so he adapts smoothly to a variety of enemy setups.
High-Multiplier Dual-Attribute Combat Skill
His Combat Skill costs 2 SP, yet delivers a high-multiplier Blast Attack that carries both Slash and Ice attributes. On top of that, his Ultimate restores 2 SP.
Ultimate Gives Buff, Action Advance, and SP Recovery
His Ultimate grants a self-buff, pushes his next Action Order forward by 100%, and restores 2 SP. This means he can act again quickly while also making up for the SP used by his Combat Skill.
Has a DMG-Boosting Self-Buff
The Hyped effect from his Combat Skill or Ultimate increases his ATK and CRIT DMG, stacking up to six times. His Passive raises CRIT DMG after breaking Plates, and the Ultimate further boosts his Combat Skill damage multiplier, so he keeps his own output strong.
Best Team Comps for Gen Narumi (Japan's Strongest Santa)
Physical and Elemental Team
This setup is a Gen + 2 Supporters team comp. Your two Supporters strengthen Gen's damage and overall stats, while his high SP cost is covered through Kafka's SP Recovery buff, which keeps the rotation smooth.
Best Squad Setup & Recommended TeamsBest Weapons for Gen Narumi (Japan's Strongest Santa)
Best Weapon is GS-Xmas25

The best weapon for Gen is his signature, GS-Xmas25. Besides boosting CRIT Rate, it grants DMG Dealt UP and Ultimate Gauge Charge Rate buffs that can stack up to 4 times depending on his SP usage, making it ideal for Gen, who consumes SP quickly.
GS‐Xmas25 (5-Star Gunsword)Other Recommended Weapons
Other than his signature, GS-3305 is recommended for boosting DMG dealt and Ultimate Gauge. Takamimusubi, obtainable by exchanging Proof of Valor in the Fierce Battle Area, increases damage when destroying Plates and pairs well with Gen.
Best Unipart for Gen Narumi (Japan's Strongest Santa)
Recommended Unipart
| Uniparts | Reasons |
|---|---|
Lizard-Type | - If you don't have GS-Xmas25 or he is at A0, Gen struggles to build CRIT Rate on his own - He boosts his CRIT DMG with self-buffs, so you’ll want to support him by increasing his CRIT Rate - Enhance his damage with buffs before his Ultimate |
Recommended Stats by Part
| Arms | Body | Legs |
|---|---|---|
| ATK | CRIT DMG | SPD |
Best Skill Enhance Priority for Gen Narumi (Japan's Strongest Santa)
Recommended Skill Upgrade Priority
| Normal Attack | TBD |
|---|---|
| Combat Skill | TBD |
| Ultimate | TBD |
| Follow-Up Skill | TBD |
| Passive Skill | TBD |
Normal Attack
| Dazzling Strike | ||
|---|---|---|
| - Deals Slash and Ice DMG equal to 34% of this unit's ATK to a single Kaiju. | ||
| Ult Gauge Charge | Attack Type | Attack Range |
| 60 | Slash Ice | ST Attack |
Combat Skill
| Exceptional Onslaught | |||
|---|---|---|---|
| - Consumes 2 SP. - Deals Slash and Ice DMG equal to 233% of this unit's ATK to a single Kaiju. - Deals Slash and Ice DMG equal to 44% of this unit's ATK to adjacent Kaiju. - After attacking, deals Shot Additional DMG equal to 32% of this unit's ATK to the target. | |||
| SP Cost | Ult Gauge Charge | Attack Type | Attack Range |
| 2 | 90 | Slash Ice | Blast Attack |
Ultimate
| Magnificent Posing | ||
|---|---|---|
| - Applies Combat Skill DMG Multiplier +28.3% (2 turn(s)) to this unit. - Advances this unit's next Action Order by 100%. - SP +2. | ||
| Ult Gauge Limit | Attack Type | Attack Range |
| 300 | Enhance | |
Follow-Up Skill
| Ultra Generous Support | ||
|---|---|---|
| - Deals Slash and Ice DMG equal to 77% of this unit's ATK to a single Kaiju. | ||
| Ult Gauge Charge | Attack Type | Attack Range |
| 60 | Slash Ice | ST Attack |
Passive Skills
Ace in the Hole
| Effect |
|---|
| - After activating Combat Skill or Ultimate, applies 1 stack(s) of Hyped to this unit. Max 6 stack(s). - Hyped: This unit's ATK +2.3%, CRIT DMG +3.4%. |
Additional Passive Skills
| Vigilant Demeanor |
|---|
| Required Character Lv. Limit: Lv. 40 - After activating Combat Skill, applies Effect RES +35% (2 turn(s)) to this unit. |
| Sharp-Eyed Strategy |
| Required Character Lv. Limit: Lv. 60 - At the start of battle, this unit's Ultimate Gauge +60. |
| Christmas Eve Dispatch |
| Required Character Lv. Limit: Lv. 80 - After destroying a PLT, applies CRIT DMG +24% (1 turn(s)) to this unit. |
Ascension Priority & Effects for Gen Narumi (Japan's Strongest Santa)
| A1 | Recommendation: ★★★★・ Successful Promotion - After activating Combat Skill, applies CRIT Rate +5% to this unit. Max 3 stack(s). |
|---|---|
| A2 | Recommendation: ★★★★・ In the Spotlight - Before activating Combat Skill, applies DEF PEN Rate +15% (2 turn(s)) to this unit. |
| A3 | Recommendation: ★★★・・ Calculated Demeanor - Normal Attack, Combat Skill Lv. +2. - Normal Attack, Combat Skill Max Lv. +2. |
| A4 | Recommendation: ★★★★・ Smart Neutralization - When remaining HP is 50% or more, this unit's Ultimate Gauge Charge Rate +16%. |
| A5 | Recommendation: ★★★・・ Carefree Santa Claus - Ultimate, Passive Skill, Follow-Up Skill Lv. +2. - Ultimate, Passive Skill, Follow-Up Skill Max Lv. +2. |
| A6 | Recommendation: ★★★★★ Peak Performance - Hyped max stack count +4. - Will apply 2 stack(s) of Hyped to this unit after activating Combat Skill or Ultimate. |
Gen mainly boosts his damage through Ascensions: at A1, he gains CRIT Rate UP after using his Combat Skill; at A2, he gets DEF PEN Rate UP before his Combat Skill; and at A6, he increases both the number of Hyped stacks applied and the max stacks. At A6, he applies 2 Hyped stacks and raises the max stacks by +4, making his buffs very strong.
Gen Narumi Profile
Profile
| Affiliation | |
|---|---|
| Birthday | |
| Height | |
| Likes |
Introduction
Voice Actor
| VA | Koki Uchiyama |
|---|---|
| Notable Roles | - Hunter x Hunter (Meruem) - Jujutsu Kaisen (Toge) - My Hero Academia (Tomura) |
Gen Narumi is voiced by Koki Uchiyama.
Kaiju 8 The Game Related Guides

Character Guides
| All Characters List | Voice Actor List |
| Free 5★ Character to Pick | Best 4★ Characters |
| Completion Tracker Tool |