Super Potato Ikebukuro Game Yokochou (スーパーポテト池袋ゲーム横丁).
Do you like playing games?
Finally, you may be able to find the retro games here that you are looking for a long time. There are many kinds of retro games and hardware as well in this game store.

Source of a Quote レトロゲーム実況ブログ

Here is the second-hand retro game shop “Super Potato” in Ikebukuro and there are some branches around Japan. The branches are located in Osaka, Nagoya, Akihabara and Ikebukuro in Tokyo. The store is smaller than its Akihabara counterpart, but the shelves are fully stacked of games.
You can buy and sell in this store.

Source of a Quote レトロゲーム実況ブログ