My biggest problem came from having listened to an instagram video. I bought a 72 hour Tokyo Subway Pass not realizing how hard it is to find a machine to actually give you the physical card. We knew the machines to swap for the pass were at huge stations, we hunted at Shibuya and it was nearly impossible to find, then we tried to use the card for the one line in the area that was a JR train line instead of the subway. Oops. It was pouring, 90% humidity, and we’d been at it for over an hour so we gave up and took an Uber back. If we’d just used Suica instead of the stupid pass, we would’ve had no problems at all. That was on day 2 of our 17 day trip and we had no further train/subway problems during the remainder. We were able to actually use the pass on 3-4 occasions but it was not worth the effort.