[MMM]

I think adding Tokyo is too much. For some reason people feel like they haven't been to "Japan" unless they go to "Tokyo". That is like saying you haven't seen America unless you go to Los Angeles. Tokyo is great, and has a lot to offer, but I'd stick to Kansai. I am in Kansai on vacation for two weeks right now, and will be traveling a bit like you, but am not going to spend the money to go to Tokyo when I can find most of the same things in Osaka, etc.

You will be here for perfect timing to do Hanami. Himeji Castle is great for that, and there are lots of places in Osaka and Kyoto, as well. Make that a central theme for your trip.