>>1642933I like it. There's a large variety of rolling stock, always something to catch the eye. There's also Tokyo Live Camera
https://www.youtube.com/watch?v=QOjmvL3e7Lc that watches a section of line near Shiodome/Shimbashi stations. Kuma Kuma Kuma
https://www.youtube.com/channel/UCDyC7xeQxsihyZj8SoICLEw also has a bunch of live cams on JR lines, including Kyoto and Fukuoka, as well as JR lines in Saitama outside of Tokyo.
There's also two other cams I remember watching, one outside of Kanazawa station and one outside of Sendai station, but I don't remember the channels. Those are more shinkansen oriented, but you do get to see some local and limited express services from the Kanazawa cam.