Did you know about this?
If you are traveling to Japan ... You might want to take advantage of this.
https://www.world.jal.co.jp/world/en/japan_explorer_pass/in/reservation/?_ga=2.6646321.2068317275.1565999698-1519191117.1557451668 <https://www.world.jal.co.jp/world/en/japan_explorer_pass/in/reservation/?_ga=2.6646321.2068317275.1565999698-1519191117.1557451668>