I know I'm much too late on this, but for anyone going to Osaka, Kyoto, Kobe, then you should also consider Nara.
It's also very easily accessible from Osaka, and has much more ancient history than Kyoto. You can take a guided tour of tombs, temples, or just nature there (free) using the app provided by the Nara Kofun and Heritage Foundation (link below)
https://www.naraiseki.org/en/smartphone-application-en/