I think there is some sort of time dilation effect that takes place on the Chuo line in the direction of Hachioji. I believe I’ve isolated the origin of the phenomenon to Kokubunji. This train display demonstrates the problem. It says it is 11:08 and I’ll be in Hachioji in 18 minutes. But it’s just not true. It will end up taking about 30 minutes. Are there any physicists interested in researching this? There could be a journal paper in it.