When I first read this, "
Kid Yamato is locked in a cave with 3 powerful samurai, one of them seems to be Shimotsuki Ushimaru" I read it as Kid and Yamato and I'm asking myself why is Kid in the flashback. Now I realize the manga is talking about when Yamato was a child.
This could be interesting. Now, Yamato will have another connection to Zoro. Not just through Oden. Hopefully we will get some insight on how strong Ushimaru was. This could lead to some more info on Ryuma.