Hearing the Golden-Eyed Toad's astonishment, Naruto said, "Kurama, why does that guy seem to know you and Asura...?"
Kurama asked in confusion, "Didn't that senile toad on Mount Myōboku tell you everything?"
Naruto answered honestly, "The letter only said the Golden-Eyed Toad was an evil frog from Mount Myōboku a thousand years ago, an existence on par with the Nine-Headed Snake Sage of Ryūchi Cave, with terrifying poison. The Great Toad Sage didn't mention anything else, including how that toad ended up kicking the bucket..."
Kurama said, "Don't tell me that old fool fell asleep halfway through writing the letter?"
Naruto said, "Very possible..."
Kurama said, "Or he wrote on both sides of the paper, and you, you scatterbrain, only read the front..."
Naruto said, "H-how could that be? H-how could I make such a basic mistake, believe it...!!"
Kurama said, "Hmph, never mind... I'll tell you the rest!"
As it turned out, after Kaguya was sealed, the Ninshu led by the Sage of Six Paths took on the responsibility of maintaining order in the world.
The Three Great Sage Lands each kept to their own corner, agreeing not to interfere with the outside world.
But after the Sage of Six Paths died, the Golden-Eyed Toad deserted Mount Myōboku and rampaged through the world, killing many heirs of Ninshu as well as innocent civilians.
As the heir of Six Paths Ninshu, Asura sought the Great Toad Sage's approval before setting out to defeat the Golden-Eyed Toad.
Kurama said, "Incidentally, I fought in that battle too!"
Naruto exclaimed, "Does that mean Asura was your jinchūriki???"
Kurama said, "Jinchūriki... isn't quite the right word."
Naruto asked, "What do you mean?"
Kurama said, "From the One-Tail, Shukaku, to me, we were all created by the Sage of Six Paths. As his rightful heir,