The other day I went to the airport to meet Mum and Dad who were here for a brief visit. Qantas arrives bright and early - at 6am - so I took the first train for the morning from Nippori (5:07). There was a woman sitting opposite me, sleeping, like most people on the train. But she had her bag on the seat - a serious breech of train etiquette. This is fine if there is no one standing, but there were quite a few. She sat the whole way from Nippori to Narita City.
In the whole hour and a half, not once did anyone attempt to shift the bag or wake her so they could sit down. I am simultaneously impressed by the self restraint and appalled by the lack of initiative.