I would say that you'd be better putting this thread in the Japan subforum, but it wouldn't make a difference, lol. The subforum isn't very active and hasn't been helpful for anyone outside of Tokyo.
Anyway, I'm also in Kansai (but in the countryside about 2 hours from Osaka) and I've been looking too. Cure has a listing of cosplay gatherings/photo ops/events, but it's all in Japanese, so you might have to get some help if you can't read.
Here's the link: http://ja.curecos.com/event/