Shinkasen timing ghibli park

Hey travelers

I am going to Ghibli Park on a 10-5pm park hours day from Kyoto. We have to take the shinkansen from Kyoto then back after the park. I am booking the train rides ahead of time.

If the park closes at 5pm, what would be a good time to catch the Nagoya to Kyoto on the way back?

I see the commute is about 40-45 mins back to nagoya station. I'm wondering how much wiggle room to leave in addition, as I'm guessing the trains could be crowded with everyone leaving at 5pm.

Thank you for your help!