When I first moved to Japan in high school and later again after college, I broke many etiquette rules. But as my Japanese friends were quick to inform me, these etiquette guidelines were far from mere suggestions — they were important rules. American mentality and did my best to conform — especially when riding the subway or train, which I did every day for my commute to work. To the Japanese, lining up single-file on the subway platform or turning phones to silent upon entering a train are just common sense. Below are seven train etiquette mistakes I made when I first moved to Japan that many other Americans frequently make — and that you can avoid.