I bought Kitaca, the IC prepaid train ticket from JR Hokkaido just for fun. I have Suica already, which I used to use in Tokyo.
The name Kitaca is a nice pun. KITA means NORTH, which relates with Hokkaido of course, and besides, when we hear the word “kitaka”, it sounds like “You did come at last!”. I think this very wise and nice naming, because it makes sense when we consider that Hokkaido is an isolated northern island:)
In Kansai where I live now, we have Icoca. “Ikoka” sounds as if someone says “Let’s go” in Kansai dialect. I think it’s nice naming, too:D