>>74149542$75-80k is already above average salary, that's like $4k a month after taxes and such. In big cities you'd definitely have to live with people, but outside of NYC, west coast cities, and Chicago, you can live mildly comfortable on that.
But that's almost 2.5x the average salary in Japan, where rents outside of downtown Tokyo are like ¥60,000 or $400~ for a 1 room kitchen apartment.