Osaka/Nagoya and other Gameshops

I make my fourth trip to Japan in 3 days, so that I still need some locations. I`m not an eBay seller, I only buy for my personal collection and two friends, mostly famicom.



1.) Osaka:

Sell the other Super Potato Stores (exept the one in Nihonbashi and Akiba) games for older Systems ?

I know in Nihonbashi, Mandarake, A-Too, Super Potato, TV-Retro, Sofmap and Big Tiger sell older games. One Retro-Shop after TV-Retro between some Sex-Shops (3. Floor) are closed last year.

I read an old topic here, there was a shop in Osaka called Magic Box. How I can find the "Magic Box" Shop or other shops with older games (Famicom, Saturn..) in Osaka ?

I also heard from a gameshop in Izumi-City "Radio Stock". I really don`t know how I can find the Place "Izumi City".

2.) Nagoya:
Any recommended Shops in Nagoya except K-House, Dolphin and Access Field in Kamimaezu ?

3.) The same in Kyoto ?

4.) Tokyo:
Is Best, Yamada Denki and Furuhonya/Furumangaya recommended ? Do have these shops an Internet-Webside with Maps (...I was looking for stores in Tokyo) ?

How I can find this nice Store with so many Famicom and Saturn Games ?
http://www.segagagadomain.com/junk/retrogaming2.htm

I go to the Big Gameshop in Gumyo (Tougane Kanteidan). On this away, any recommended places to check ? Maybe Hardoff in Chiba when it is not too far to foot (Map) ?

BTW: I had thoughts that the Gamengai and Assemblergames Forums can make much money to create a book "100 Secret Used Gameshops in Japan". It reminds on the guy in germany that make a book "100 rare Mega Drive Cartridges" with very high collectorprices (e.g. 1000 Yen game for 100 Euro value) for just the reason that he can sell his own games for a "ripp off" price.

Greetings Markus