It was fine and hot.
It seems there was an accident and the trains were behind the schedule.
Usually trains are so packed after such accident, it was not the case today.
Since it was Friday, many people went out for dinner or drink, and around 8 pm was not rush hour yet.
In any case, I usually drop at Shinagawa once to wait for the train starting from Shinagawa so that I can sit because I need to ride from 70 minutes to 90 minutes depending on the time.