All Chocolatories have the same selection of very high end (overpriced IMO) kit kats -- no local variation. Your best bet for variety in Osaka is the Namba Donki, which a couple weeks ago had 1/2 dozen of the 800y boxes plus another 1/2 dozen of the cheaper bags (including sake, the bake special, an easter special, and the cranberry/almond singles in milk and white, which I never saw anywhere else in three weeks all over Japan).