I've asked a few questions regarding my upcoming trip to Japan. I've heard lots of suggestion to use various rail transportation to travel to different cities and specific places. Can someone either direct me to a website or describe the different types of trains in Japan, or at least in the bigger cities? I know there's the shinkansen, but apparently, there are different types with different levels of service, restrictions (when using a J-Pass), etc., and then there are also regional and local trains. Are those the same as commuter trains in other countries? And then there are subways, monorails, etc. Any clarification/explanation on the different types of trains/rail lines that I would most likely come across in Japan would be great. Thanks!