Will this be one of those Japanese quirks just like 5pm, where they say 4 day work week, but then still work 5-6 work weeks? Like sure, you can leave at 5, but

Will this be one of those Japanese quirks just like 5pm, where they say 4 day work week, but then still work 5-6 work weeks? Like sure, you can leave at 5, but do you want to be the person to leave at 5?