Weekend was close, but no idea how to spend it. After some thinking and checking map decided I'v never been in Nikko. Actually I was in Nikko, but just passed it on the way to Sendai by bicycle.
Woke up really early, exactly as Google advised got to Kitasenju station... and stuck. When I got to the platform just a minute before Nikko train should depart I did not find the train, after couple of seconds I found some short train in the end of the platform, but it's front plate had some other name than Nikko. Minute passed, that train departed and only when it was passing I noticed back half of the train had plate with Nikko. It was one of that trains which separates in some point and goes to different directions.
I had to wait another 40 minutes for the next train. Finally I got to my train and got time to sleep a bit.
I woke up because it was too quiet for too long time, it was exactly that point where the train should separate. While it was doing it I noticed old man running from car to car selling obento (I will see him later again). It was my first time seeing someone not related to railroad company selling food in a train. Few stations later I got to Nikko station, here is it.