[Morgawr]

Nope, I see people with luggage on trains all the time, especially the Narita and Haneda train lines (obviously). Locals too.

[rjh29]

It's far more common for foreigners to carry luggage on the trains in my experience. Especially on the subway.

[Morgawr]

Wouldn't that be a biased view based on the fact that foreigners are the ones more likely to travel?

[rjh29]

I did consider that, the other factor is Japanese people travel for smaller periods of time so maybe carry tiny suitcases instead of the (multiple) huge ones you see foreigners carry.