Also, conbinis go well with walking and public transport culture. The USA's car culture with their necessity for big parking lots and lack of walking culture, just don't sound like they'd be very compatible with conbinis, except maybe at gas stations. Though, it is not like Europe has them even though I wish we did (I am guessing this might be down to cost of real estate, workers, and again, city density, some of which also apply to the USA of course).
Cheap, ubiquitous, and tasty food available 24/7 has a lot of merits. Not to mention there are no blue laws in Japan that limit when alcohol can be sold.
You can get sushi that's actually good for 80% cheaper than the "California rolls with crap on them" you'll find in most of the USA, though, so it all evens out IMO
It's also 2-3x the quality and taste. Strawberries in the US have no taste at all; in Japan, they're amazing.
You can come close to Japanese fruit quality just buying organic in the US.
Sure, and then the cost for American fruit looks very similar to that "expensive" Japanese fruit.
But having lived in Japan, I also missed some of the North American 7-11 food: pizza[1], hot dogs[2], and slurpees are not available at 7-11 in Japan.
[1] They have pizza bread which is fluffy bread with a sprinkling of onions, corn, tomato sauce and mayo which is not great [2] They have hot dogs but it's fluffy bread with a toothpick-diameter sausage inside. It's a shame because they also sell decent deep-fried on a stick but without the bun
Look at the average US 7-11 employee. Do you actually want them manhandling your food? We get prepackaged food because we have strict kitchen regulations because the average minimum-wage employee is kinda lazy and has poor hygiene.