I was just in Japan two weeks ago, and convenience stores were omnipresent. I'll admit, it was incredibly convenient, as I never went for lack of food or water, and I got into habit of grabbing a beer and a snack every night to take back to my hotel room before bed. I was relying on them (and vending machines) pretty heavily for coffee and green tea throughout the day as well.
There were way too many convenience stores that were open in the middle of the night, though (and apparently this is a requirement on the franchisees). There was a 24/7 convenience store on the first floor of my hotel, and then another one down the block, and then several more within a two block radius. There's no reason they couldn't all coordinate better so that each individual store is only open through the night a couple times per week. That would make a lot more sense. Most customers would still be able to reach an open convenience store, even in the middle of the night, within a few blocks walk. It'd be nice if stores had posted the hours of nearby stores so you'd know where else to go if the one you wanted was closed, but that's probably unnecessary now in the age of apps (I had no problem finding opening times for places on Google Maps).
There were way too many convenience stores that were open in the middle of the night, though (and apparently this is a requirement on the franchisees). There was a 24/7 convenience store on the first floor of my hotel, and then another one down the block, and then several more within a two block radius. There's no reason they couldn't all coordinate better so that each individual store is only open through the night a couple times per week. That would make a lot more sense. Most customers would still be able to reach an open convenience store, even in the middle of the night, within a few blocks walk. It'd be nice if stores had posted the hours of nearby stores so you'd know where else to go if the one you wanted was closed, but that's probably unnecessary now in the age of apps (I had no problem finding opening times for places on Google Maps).