Midori-ku is VERY accessible by car. In fact it is accessible by Subway too, being a suburb of Nagoya and all.And Midori-ku? That's like the wilds. Completely inaccessible by car, isn't it?
The shop is called Malhen (メルヘン) and it is a short stroll form Aioiyama station on the Sakura-dori (Red) subway line. Hardly the wilds. I have no idea what stuff they stock, it is quite a big shop and they used to have a CCG area up on the 2nd floor. I used to live about 5 minutes away by bike.
Linky here: http://www.marchen-toy.co.jp/index_guide.htm
OT How ironic it is. I used to live in Midori-ku when it was one of the more inconvenient suburbs of Nagoya. Since I left the subway has been extended out there, a Subway sandwich shop has opened and there is a GW stockist to boot. Woah is me. :(