Most other places are super expensive or convenient or high quality. But hardly all combined. That's why Asian Konbinis are great. Note this is true of most of Asia, not just Japan.
Maybe it's just the big cities, but I think maybe this part of the world just demands this from anyone selling food. If you aren't providing this quality, you won't stay in business because there's too much competition that is.
1: probably even less than that; last time I seriously checked this was in 2021, and our inflation runs at 20% per year, while income mostly stays the same.
That said, I've been to 25 countries / 40 cities in the past 2 years and Tokyo felt like an anomaly.
Price-wise, it wasn't too dissimilar to Eastern bloc countries where average salary would be yet again half what they are in Japan. You could get a great meal at a decent restaurant for well under 10 euros. Something similar in Manhattan would be over twice the cost. In a place like Bucharest, probably still more and be of worse quality.
And the city itself is highly modern and clean, unlike in those nations. It presents as a place that should be incredibly expensive in many aspects, yet it isn't - ie. the subway system is world class, yet a fraction of what the subway costs in NYC.
Right now I'm in Mexico City, and I've told many folks who live here, to their amazement, that Tokyo is roughly similar in cost for what I call 'middle class' living. In fact, for nicer restaurants, it seems more expensive here compared to similar places in Tokyo. Street food and the like is still a fair bit cheaper here, but when you simply look outside and try to compare them, it is shocking.