KIX To Aeon Mall in Sennan

Hi, I have a stopover at Kansai International Airport and I have a 7 hour stopover there. I plan to do some shopping at Aeon Mall in Sennan particularly because it has the closest Tower Records from Kansai International Airport. My question is, can someone give me a guide to get there? I want to get there through the cheapest method and fastest time if that is possible. I checked google maps, and it told me to take Nankai trains to Okadaura Station. Then I must walk to Aeon Mall. Any suggestions so that I can make it back to the airport in time? And I also need help with figuring out what train to ride when i'm at the stations (floor marks, signs). And how do I know which train to switch to such as when i switch trains at the Izumisano Station? Thank you!

It is a complicated situation (infrequent shuttle buses from various nearby stations), explained in Japanese here:
http://rinkusennan-aeonmall.com/accessguide/accessguide3.jsp

Unfortunately Aeon malls in general tend to think only about car drivers and provide no convenient access by public transportation.

If you have problems figuring out the shuttle bus system, I recommend to walk to the mall from Okadaura Station. You can look up connections from the airport here: http://www.hyperdia.com/

If you know your connection times, the transfers at at Izumisano Station should pose no major problems. Just look for the platform from which a train in direction of Wakayama (as opposed to Kansai Airport and Osaka-Namba) departs at the noted departure time (it will be either a "local" or "sub express" trains - the faster train categories do not stop at Okadaura).