drewn123 5 days only osaka i guess most people would say it’s too long. 1 day USJ, 2 days aquarium + the city would be plenty. The other 2-3 days do more day trips to Kyoto.

Then Osaka ~2 days is enough. Kyoto, 3-4 days also not enough. Either you make 3-4x day trips, or move to Kyoto for a few days

for trips to osaka surrounding areas like kyoto, nara, kobe i would say it costs about 800 yen one way.

subways usually costs 180-260 yen one way to any locations within the city itself. buses costs about the same for one way trips.

trips in and out from airport costs from 1100-1700 yen one way.

i just came back from osaka yesterday so i can still more or less remember the costs. 

so u can do the math there yourself and see if its worth it.