That's also very true! That's certainly how Koumyou had ended up with the Maten alongside the Seiten -- it needed a protector when Tenkai died, and he was it.

Though why it hadn't been assigned a whole other Sanzo later was anyone's guess. Tenkai had probably seen Genjo in Koumyou's future, and knew Koumyou was the path to its next guardian.

Shit was complicated like that when seeing the future got involved.

"That, I don't know. And I certainly have other reasons to help murder anything that comes after the train, now."