I know, right? But my trip to Japan made me realize a few, surprisingly massive, key factors that differentiate the US from them are:

• Publicly available drinking water: while the US's added fluoride is certainly contested by various groups, readily available drinking water is at least present almost everywhere. It is hard to find potable water in Europe, and Japan has zero drinking fountains. There are no water bottle refill stations. They just don't exist at all there. It's really kind of crazy given their unbelievably intense, sauna-like weather outdoors for the entirety of their sweltering summers (the humidity made it feel like 110° F in July; you burst into sweat after just a few minutes outside, literally, and many people use portable, electric fans, etc.), but they just expect you to be be self-sufficient carrying with your own water or to just tough it out until you get home or whatever.
• Trash cans while out and about: believe it or not, garbage is actually very difficult to dispose of in Japan, to the point of my late sister who had lived there for years advising us to take advantage of konbinis (convenience stores) to dump your trash, because you could literally go to multiple entire stores and not see a single trash can anywhere. You basically otherwise have to hold it with you until you get home.
• Americans with Disabilities Act: I was shocked to see how only some of Japan's numerous, famous labyrinths of subways have escalators or elevators; some had literally none, so if you're wheelchair-/scooter-bound or even on crutches, you just can't ride trains at all. Additionally, I saw a business that had perhaps 2 dozen workers confined to an insanely tight room for their daily work; there were no cubicles at that place. The computer desks per worker literally touched each other, so you could stretch your arms sideways and you'd already hit your coworkers in the face. I wish I could say I was exaggerating but that kind of crammed, sardine can-level packing was so disgusting and demeaning to the hard workers there that I felt just a little more grateful to be in the US, where that kind of treatment towards employees, who couldn't even walk 2 feet without bumping into a colleague's chair, would absolutely not fly with the civil rights lawyers here.

Despite all the amazing things in Japan, from their higher-quality food to the blazing-fast Shinkansen trains and incredibly efficient, bidet-equipped Toto sink toilets, etc., I found just some various aspects of daily life there (especially the lack of easily discoverable water in the raging summer heat) to be quite eye-opening in a reverse way just as much. I do not think I could easily move and live there, even if they all suddenly spoke English.