https://en.wikipedia.org/wiki/List_of_countries_by_Internet_connection_speeds
07. United States 274.16 Mbit/s
19. Japan 212.06 Mbit/s
According to this page, seemingly sourced from Ookla, US has way higher average speeds these days.
Japan had way faster internet on average than the US like twenty years ago, but the US actually did a decent amount of broadband growth even if it still doesn't cover rural areas well.