There is a place called Spice Records that does 2nd hand stuff. Disk Union has a HUGE selection of det and chicago stuff (new and old)
The best thing to do is go to Cisco and ask. the other shops are near cisco but to try and tell you on the map is a bit hard! Disk Union has a flyer which has all the maps of the other stores, and someone can translate it to english for you. Lonely planet has cisco on the map, just follow it! all the cisco stores have different stuff, even just the house one next to the techno one has different stuff. the Osaka one is pretty good if you get a chance to go down there! good luck! Melody