I need your help with the itinerary. We (two agile travellers) will have 5 nights in the region. What we want to see is Kyoto, Hiroshima and Miyajima, Osaka, Nara and possibly Koyasan. Now, everything is quite easy to fit in, but Koyasan is tricky. Here is the rough plan, please feel free to suggest any changes:
Day 1: arrival by midday in Kyoto, see part of the city, spend the night
Day 2: Miyajima (gate, cable car, lunch), Hiroshima (park, museum, dinner), back to Kyoto to stay for the night
Day 3: Kyoto whole day and sleep in Kyoto
Day 4: Osaka (aquarium is a must, possibly Universal Studios, plus the usual things in the centre), spend the night in Osaka
Day 5: Osaka for the morning, see whatever we didn't have time for the day before, head to Koyasan to sleep in a temple
Day 6: head for Nara and afterwards whenever we like, there is no time pressure, go back to Tokyo.
We are obviously spending only 1,5 days in Kyoto. There is a possibility to squeeze a day more (we have a 7 day JRP), but I guess my biggest question is do we have to and is Koyasan worth that one day.