I am impressed with this very busy train. Before reaching each station, they will make an announcement in Japanese and English about the name of the next station and the door will open on the right or left side.
There is also a digital display that shows the names of all the stations on the line and the number of minutes to arrive at that station. This display is updated on reaching each station.
When I take the MRT in Singapore, I often have to look out of the window to see if the door will open on the left or the right side at the next station. In some trains, there is a digital display (which is often confusing) but in other trains, there is no such display.
The people in Tokyo knows how to provide relevant and useful information to the commuters. I hope that SMRT and LTA can learn from them.
I spoke to a friend today about my experience. He confirmed that he encounters this problem often, and often ended up on the wrong side of the train.