Is it common for people to cut you in line to get on the subway?

I've lived in Tokyo for about 1.5 years now, and more and more I'm noticing people cutting or shoving in front of me in line to get onto the subway car first. Usually Japanese salarymen. I'm just curious – do they do this to everyone, or is it because I'm a foreigner/woman that they feel entitled to do this?

I generally just let them do it because I don't want to engage with them, but it's surprising to me in a country where rule-following regarding waiting in line is generally quite strict.