Transportation tickets are time sensitive too! Some of my friends do insane amount of travel per year. Apparently, they book their tickets in advance at least 6

Transportation tickets are time sensitive too! Some of my friends do insane amount of travel per year. Apparently, they book their tickets in advance at least 6 months in advance so they can save as the tickets are wickedly cheaper. Also, see if you can get a discount as a visitor for transportation like the JR Pass in japan.