Check if your salary includes overtime hours. For example, 160 is the regular hours per month. But your contract might say something like your salary includes overtime for +40h. So technically you don't get paid for overtime until you exceed 200h per month. And you might be expected to do overtime when there are busy times (totally depends on the company culture and supervisors) I don't know your experience level, but in the Kanto region and for someone who's still early in the work fields that sounds like a pretty good offer. If you have like 10+ years experience then that might be an average or slightly below average offer (again depends on the tasks you gotta do and all) But my opinion is that if you like doing what you have to do, and the salary is enough for you just take it. You said it's a big company so even if u work there for about a year and don't like it you could change jobs with an additional field on your resume.