How did shisui know he could only use kobo once in a decade

[ItsBenito]

When he achieved MS how did shisui know he could only use Kobo once in a decade?

 

[Saiyan Kammy]

Because of Kagami.

 

[lndra]

The Will of P[lot] told him.

 

[Angelic.]

ask chie

 

[~Ethereal~]

By using it for the first time when he was 10 years old and when he turned 22 he came to realise it.

 

[SumnNarutoRelated]

he asked itachi if he could place him under Tsukuyomi so he can experience 10 years in one sec. Itachi, hesitant at first, eventually agreed. While under Tsukuyomi, Shisui activated Koto and turned it off immediately. It was then he had to wait up to 10 years to use it again. Though it took 10 years under Tskuyomi, only one second had passed in the real world

 

[Gintõki1]

It's called Kishi magic. The same magic that was able to ruin a childhood memory of millions of people in a short time.

 

[Insidious Smile]

The God of the verse known as Kishimoto whispered in Shisui's ear.

Kishi knew that he had given a character one of the most overpowered abilities which is why he limited the use of Koto. It's the same with Naruto being limited on the amount of clone he can create gathering natural energy.

 

[The Necromancer]

How did Kakashi know that Kamui was named Kamui?

 

[Uchiha boii]

Tbh I believe he meant a non a uchiha without senju cells could only use it once a decade shisui himself shouldn't be THAT limited maybe once a day for shisui himself