Kamikaze vs Kaiju No. 9: who would win?

Too close to call

Kamikaze · One-Punch Man · Base

Tier

6-B, up to 6-A

Attack Potency

Country Level, up to Continent Level

Speed

Massively Hypersonic+, up to Relativistic

Durability

Continent Level

Kaiju No. 9 · Kaiju No. 8 · Post No. 2 Absorption

Tier

6-B, up to 6-A

Attack Potency

Large Country Level, up to Continent Level

Speed

Massively Hypersonic, up to Ftl

Durability

Large Country Level

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.