How to go to your hotel from the Kansai Airport? Which route is the most convenient one and which station to transit? Which exit is better if we carry large baggage? Thanks
I recommend you to use Nankai railway from Kansai airport to Nankai Namba, then take taxi from the Namba station to the hotel if you are carrying big luggage.
Even business trip of Japanese with light business bag, getting to the hotel from the subway station is not easy because passenger's route near the hotel is narrow and there are several stairs from subway station and there are many people of sightseeing and business.
The nearest subway station is Nipponbashi, not Namba, one stop by subway.
There are other way from Namba station to hotel using "Namba Walk", but it will take 10 ~ 15 minutes work and Namba Walk is usually crowded.
Taking the train from Namba to Nipponbashi is not so recommended because you need to use stairs or crowded escalators several times for 1 stop by subway.
Enjoy trip in Japan!