Board Thread:Questions and Answers/@comment-26509182-20150618162346/@comment-26509182-20150929170557

You'd think so, but nope. When Ichigo and Inoue run around searching for Rukia, he says to Inoue, "You searched everywhere in the city with the Rikka, right? So there is only one place left to look."

He deduced that Rukia was at Kukaku's instead of using his spiritual power to find her.

So why is it obvious to Ichigo that Rukia is at Kukaku's? Are readers supposed to assume that Ichigo already knows about Kaien? Or is it just that in Ichigo's mind Soul Society = Seireitei + Kukaku's place, simply because these were (just about) the only two places in Soul Society he's been to, so if Rukia wasn't in Seireitei she's got to be at Kukaku's?