You are in luck.
Recettear: An Item Shop's Tale
http://www.carpefulgur.com/recettear/
It's a little different from a standard JRPG, and the dungeons are realtime and not turnbased, but I found the game to be utterly charming, occasionally funny, and definitely fun. It's PC only, so you can lord that over your console playing friends (seeing as, to my knowledge and in my opinion, there are NO good JRPGs for current gen systems other than Disgaia 3).
The premise is that in a typical fantasy JRPG world you have to run a typical item shop, so there is an economic side to the game. However, relatively early on you can start exploring dungeons with different hero characters that all have different attacks and special moves.
I really liked this game and put in probably 25 hours in 2 days. Then my PC broke, I replaced it with an awesome one, and now I'm drowning in crappy new FPSes. This was the best JRPG I played this year (except for Mother 3 on GBA, 1/2 Minute Hero on PSP, and something on the DS, I forget what).