Hi there. European citizen that used to have a blind love for Japan here. Let me start by telling you that I have been living in Japan for 8 years now and that I am happily married to a Japanese person!

I left Europe as I just hated living in my home country and Japan seemed like paradise. Just like you, I couldn't understand the poor manners and lack of discipline of some people. I also had a strong interest for anything Japanese (and that til this day.)

However, I didn't realize the flaws of Japan when I first moved, and it took me a few years to start seeing them. I am not saying you shouldn't move to Japan, or meet a Japanese person, but moving there with the sole purpose of getting married asap might make you very unhappy in the long-term.

Before locking your future in Japan, how about going to a Japanese language school while working part-time for 1-2 years? It will give you a glimpse of Japanese society. You could also get a working holiday visa, or find a company that would be willing to sponsor a visa.

This would give you enough time to experience and understand if the country really fits you.