It's very easy in japan to find a "baito" job, that is low skill, part time and paid at the hour and with no benefits. People like the "freeters" cumulate several of these jobs to earn a decent monthly wage. The problem is of course that there is no security of employment, very little rights and as I said no benefits like pension. Housing is still doable as the market is not too high tension, but it's pretty much impossible for them to get a loan for anything. Raising children and sending them to higher education is pretty much not feasible. I guess for US people it's pretty similar to the fast-food workers earning less than livable wage.