The toy store is a location in Okinomiya. It is first seen in Watanagashi-hen, during the tournament where the customers play several games for the grand prize of 50.000 yen. It is owned by Yoshirō, an uncle of Mion and Shion, who lets Mion organize tournaments because it brings a lot of revenue.
The winner is never determined, as the tournament finals are always postponed, infamously, it is in front of this store where Keiichi decides who to give the doll to, potentialy starting a tragedy.
In Hajisarashi-hen, Keiichi came to this store because he forgot his swimming trunks so Yoshirō wanted to give him another pair, but the trunks he gave Keiichi ended up being cursed.
The store shown in the anime
The Club and Yoshirō
Table for Rika's game
The tournament
Yoshirō and Keiichi
Inside the store