It's always frustrating to read anything by most foreigners about Japanese trains. There are around 100 train companies in Japan. JR is 7 of those 100. The other 93 are NOT JR. Drawing any conclusions about Japanese trains from inspecting 7% of them is just wrong. The title, "How Japan's railways stayed one" is just false. They were never one, they are still not one. Take Tokyo, off the top of my head there is Toei,…
Not to mention the idea that JR is only 7% of Japanese railroad makes little sense in real life. JR carries a majority of rail passengers in Japan. The long tail of non JR railroad companies in Japan are small, regional operators owning maybe one or two lines with infrequent services. Many of them are also private only in the sense that they are incorporated in the same way as private companies. But if you dig a little around you will find out they are actually owned by local governments.