Osaka to Nara and to ?? and back to Osaka. Day trip

Hi there!

From Nara I recommend these options:

1. You could make it back to Shin-Osaka and then go for the afternoon in Himeji. Even though the castle is under rennovation there are still many areas that are open and you would certainly get a lot out of it. (lots of travel)
2. On the way back to Osaka on the Kansai line you can stop at the world heritage site of Horyuji (JR Horyuji station). This is my recommendation as it is very simple for you to do from Nara as it is on your way back home, and does not require a lot of time on the train.

I think Kinosaki is really an overnight trip and Kobe may not really have that much to offer if you are already staying in Osaka.

Hope this helps!