No way... The closest and simplest convenience store in Japan?

The FamilyMart near the subway station at Kanayama Station in Nagoya City, Aichi Prefecture, is only a 5-step walk across the aisle. This is definitely too close. ...Or so I'd like to say, but there's actually a good reason for it. The second image is of the convenience store on the left, which I got permission to photograph. The poster inside indicates that you need to go to the larger convenience store on the other side to make a purchase. The smaller store sells frozen items like ice cream, while everything else is sold at the larger store. Therefore, you need to use the aisle to pay for items purchased at the smaller store at the larger one. If you know of any other unusual convenience stores like this, please let me know!