Average starting salary in Japan for Non Tech and Non Teaching

I'm trying to figure out what would be a reasonable starting salary in Japan for non tech positions (administrative/desk job, etc). Ideally Tokyo, but other areas are fine too. I recognize that each person's lifestyle is different but I want to know what it is common/average.

Is 3.5 million yen a year good to start with? Will it be harder to get positions above that?

by Due-Sky-4288