Route guide
Best Business Class from the USA to Japan
7 tracked routes · 7 departure cities · 8 airlines
CabinScore tracks 7 routes from the USA to Japan, flown by 8 airlines. The best business cabin CabinScore has measured on any of them rates 9.7/10; on the weakest route the best you can do is 8.7/10. That gap is the whole reason to check before booking — the same fare buys very different seats depending on which city you leave from.
This covers the routes CabinScore tracks between the USA and Japan — not every route flown, and only the cabins it has measured. Scores come from seat metrics; the odds of actually getting a given cabin come from the tracked flight history on each route's own page.
Best Cabins on This Corridor12 of 19
The highest-scoring business cabins CabinScore has measured on the USA–Japan routes. Which of them you can book depends on your departure city — the route list below is the honest version of that.
Every Route We Track, Ranked7 routes
How This Ranking Is Built
CabinScore ranks each route by the highest-scoring business cabin it has measured on that route. Scores come from seat metrics — width, bed length, recline, direct aisle access, privacy, and cabin density — not from reviews. Full methodology.
A high score is what the best cabin on the route is worth, not a promise you will get it. Most carriers are mid-retrofit, so two aircraft on the same route the same week can be a generation apart; each route page shows the observed equipment mix, which is the number that decides your seat.
Coverage is partial in both directions: CabinScore tracks 7 routes between the USA and Japan, and scores a subset of the cabins flying them. A route or airline missing here is a gap in the data, not a judgement.