If someone went to Japan to try to find a wife.... What would be good and bad manners when talk to women?

Question:

This would involve traveling to Japan in the way the question is worded. Therefor it fits under travel => Japan

Japanese manners have some areas that are more strict and or different than Western manners.

Answer:

Not to sound offensive

With that kind of attitude expect a fast divorce

Do not be a fake

Just act yourself natural

She will see right through you