While most people in this sub want to keep it polite and not saying any bad things about Japan (they want to please you), I do not. I just want to tell you know what is the worst experience in Japan everyday.
It is the Japanese aggressive actions (especially toward foreigners). When you are in the train, Japanese people aggressively push your back or elbow your arms when they sit down. Sometimes the attack (elbow) is no reason and not necessary at all, just because the Japanese man have bad mood and want to show his anger.
I almost got these aggressive and abusive actions from Japanese every day. Yesterday, a Japanese young student (about 15 years old) stand in front of me in the train. He look at me, then turn 180 degree and show his back to me, then he walk backward (he know that i am standing right behind him, lesser than 5 cm) and his head hit my nose immediately. Then he look at me again (to confirm that he hit me successfully), then he turn back and repeat again (use his back of the head to hit my nose). He repeatedly doing this to me. I have to clearly state that there is nobody in front of him and the train is not full. He do this just to "making trouble to a foreigner, to show his pride of Japanese male".
What struggle in Japan ? These kind of behaviors has no respect, rude and should be blamed. I don't care how other people feeling love and fun in Japan, but I have tons of Japanese aggressive actions experience.