I think it's fair to say that Japan is the country in the world with the most reliable trains
I believe that would come under the time to get home calculation. Aside from that all these other points would seem to be to Japan's benefit.
Average commutes in the US are brought down by urbanites who live close to the office and suburbanites who live a modest drive away from an office park.
Sure, if you cherry pick the worst possible commutes in the worst commuting cities you're going to find pockets of ~1hr commuters, but the broader claim simply isn't true and is perpetuated by people who are themselves trying to justify their overly long commutes. The large majority of people value their time too much to put up with commutes over about 40 minutes.
Also presumably the number goes up if you exclude people who live within the metro whereas I specifically excluded that group.
> In 2019, the average one-way commute in the United States increased to a new high of 27.6 minutes [27.6]
Which would mean the reasonable "maximum" is going to be about an hour one-way. Some will commute further but it'll drop off very fast. You can actually see it in action if you graph house prices on a map around an urban area; once you are outside commuting distance from the center prices start going down. People will still commute to the edges of the metro, but the numbers who want to decreases.
And a train can create "pockets" further away by mileage.
[27.6] https://www.census.gov/newsroom/press-releases/2021/one-way-...