Yes, you can use the Japan Rail Pass (JR Pass) to travel from Kansai International Airport (KIX) to major cities like Osaka and Kyoto. The most convenient way to do this is by taking the Limited Express Haruka train. This sleek, Hello Kitty-themed train whisks passengers from KIX to Tennoji, Osaka, or Kyoto Station in about 75 minutes. To use the pass, you first need to exchange your "Exchange Order" for the actual pass at the JR Ticket Office (Midori-no-Madoguchi) or the JR-West Ticket Machine with a passport reader located in the airport station. Once you have the physical pass, you can also use it to book a reserved seat on the Haruka at no extra cost. It is important to note that the JR Pass is not valid on the Nankai Rap:t train, which is a competitor running to the Namba area. If your destination is central Osaka (Umeda), you can also take the Kansai Airport Rapid Service, which is slower than the Haruka but also fully covered by the JR Pass. Using your pass immediately upon arrival is a great way to "activate" it and maximize the value of your travel days.