damn that is cheap.
consider their a la carte ranges from 700-1000. I live in germany near freiburg and all michelin star rated restaurants here start at like ~3200 yen per meal.
(well there is prolly an exception an japanese restaurant in freiburg which serves from 600-~3200 yen per meal)
It's not Michelin but Bib Gourmand
You must be going to the fancy places. Yoshinoya's a lot cheaper, and that's for a beef bowl rather than just ramen.