I am travelling to Osaka via Kansai International Airport.
I will be staying near to Shin-Osaka station.
Besides visiting Osaka, I would like to travel to Kyoto and Nara.
The whole trip is about 6 - 8 days.
Would you please advise which type of travel pass is recommended?
You don’t need one. Rail fare to Nara or Kyoto is, like, 600-800 yen one-way. Just buy a rechargeable fare card and plan to spend most of each day in one or two places to minimize the number of trips.