Kokushibo comes from the family of a prestigious warrior family.

1. DEVIL’S SIGN

The original Demon Seal and the Demon Slayer Swordsmen’s Seal had a correlation, an expression of the state of power.

Looking back at the memories of Kokushibo’s human life, we see that the mark at that time had the same shape as the current Demon Seal.

Kimetsu no Yaiba: Unknown things about the power of Kokushibo - the strongest demon in the Twelve Demon Moons

2. SWORD

The sword that Kokushibo uses is a part of his body: A black-bladed sword with eyes sprouting from it.

Kimetsu no Yaiba: Unknown things about the power of Kokushibo - the strongest demon in the Twelve Demon Moons

3. MOON BREATH

Michikatsu uses Moon Breath and when he becomes a demon, he still uses this skill to fight.

Kimetsu no Yaiba: Unknown things about the power of Kokushibo - the strongest demon in the Twelve Demon Moons

4. BLOOD MAGIC

Surely many readers cannot help but wonder where Kokushibo’s Blood Demon Technique is?

Going back in time to the battle between the New Upper Green Kaigaku and Zenitsu, we will see a detail like this: Kaigaku used 5 forms of Thunder Breath to fight Zenitsu, while not calling `Blood Demon` at all.

The same is true in Kokushibo’s case.

Kimetsu no Yaiba: Unknown things about the power of Kokushibo - the strongest demon in the Twelve Demon Moons

Specifically: Each slash shows a crescent moon.

Because he was originally from a martial arts family, the confrontation with Kokushibo was a breathtakingly fast-paced battle.

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Kimetsu no Yaiba: Unknown things about the power of Kokushibo - the strongest demon in the Twelve Demon Moons

This article was produced with the help of MangaK.