Namba station

Hi,
You can get from KIX to Namba by JR, but you'll need to transfer trains at Tennoji or Shin-Imamiya. However, the rest of your itinerary is unclear, it would help if you gave your full itinerary. Are you returning to Osaka within a week, or leaving Japan from Narita? If the latter, it might be better to take a cheap 1000 yen to get from KIX to Namba and use the pass for longer days of travel.
For getting to Hiroshima/MIyajima, Takayama/Shirakawago, and Tokyo, you can take a bullet train either all or most of the way, leaving from Shin-Osaka Station. For Shirakawago you need to go to Takayama and catch a bus which is not covered by the JR Pass. For USJ, you can go from Namba to Nishikujo, transfer, and take a train to USJ.
You can see regular fares, routes and schedules on Hyperdia. But be sure under "More Options" to deselect "Nozomi..." since you can't ride that on the Pass.

Toraneko

Thank you for your reply...below is our Itinerary:

1st day - arrival from KIX to our hotel in Namba / go to Dotonbori & Shinsaibashi
2nd day - from our hotel to Universal Studios then go back to hotel
3rd day - from our hotel in Namba to Nagoya then go to Shirakawago then go back to the hotel in Namba
4th/last day - our hotel in Namba to Tokyo then Tokyo to our hotel.... then check out then go to Kansai airport

can you also suggest other places that we can visit within our itinerary places?

From KIX to Namva by JR, if we are going to transfer train at Tennoji or Shin-imamiya, will it be covered by JR? What time of train are we going to ride from KIX, is it a Shinkansen?

Sorry if I have too much questions, it's going to be our first time to go to Japan :)

hi! you've been so helpful...I will look into my itinerary again for I will consider the things you told me.
Is the Umeda Sky Bldg open even at night time? is it just near Dotonbori or our hotel - Hotel Monterey Grasmere?
For the Shirakawago, I just actually thought of going there because my kids wants to experience snow. Is there a much nearer place in Namba like a ski resort rather than Shirakawago? We are not really after the skiing & everything, just want to feel playing in the snow....we will be going in Japan on winter, January 17-20.

I apologize for so many questions that I ask you....sorry, it's going to be our first time :)