Why do so many people have misconceptions about how Gyokko's teleportation works?
His teleportation does NOT require him to set up vases beforehand. He summons the vase and teleports to it in the same instance. Muichiro literally points this out and people are still getting it wrong. Also, he can summon his vase practically anywhere, as seen when he summoned it under the ground during episode 9 of the Swordsmith Village Arc.