@jimmykimble:
as much as I appreciate your concern about rasistic comments, you are unfortunalely slightly missing the point.
It's statistically proven that most Western women have a hard time getting an Japanese boyfriend, while Western guys obviously don't have such a problem.
It's a valid observation and it's okay to ask why.
I don't like to see this as racism, but as a way of discussing culture.
I don't think that Japanese women want to have a western boyfriend because "he is 'easier' to controll" but rather because he will allow them way more freedom then they will be able to find in a "classic" or more accurately "conservative" Japanese realtionship.
That is one of the reasons why many Japanese Male-Western Female Relationships break sooner or later. Even if he did get up the courage to ask her out or she was just shamelessly hiting on him till he gave in, she sooner or later reaches a point, where she feels that she just can't fit in. To many rules and restriction that are simply beyond her and she refuses to accomodate to. Or do I have to remind you on the hugh cultural gap between Japan, or Asia for that matter, and pretty much all the rest of the world?
Beside the fact that it's appearantly "cool" and highly squeel worthy for Japanese girls or womans to get a non-Japanese boyfriend. And I have been told repeatedly that they really trying when it comes to that. Nothing about shy or holding back. Just play "Cinderally lost her brain and can't fix ABC" and wait for the well mannered Western Guys to jump to your rescue.... Which by the way is a way of flirting almost all around the world and wouldn't be if it doesn't work. Which isn't to say that these relationships aren't problematic either, because the women might get more freedom then they bargained for and now have to figure how to get 'well mannered' Western Guy to stop stomping on some of the most basic cultural rules she lives by.
Japanese males aren't like that. No guy is going to pretend he can't fix something so a woman (!) jumps to his rescue. Plus: they know about the different cultural perspectives. And I wager it simply irritates the hell out of them...
And:
I highly recommand googling up some relationship experiences between Westeners and Japanese. Aspecially from the Girls perspective. Or flirting techniques... most of them are so subtle, most people from outside of Asia are rather unlikely to notice them. Therefore it's actually amazing if you get something like that to work with a foreigner.
And something I read recently: if a Japanese person offers you to use their shower - which is likely to offend or irritate the hell out of most westerners - that person is not only hitting on you, but actually asking for sex. I for once would wonder if I smell, but it's part of their culture, going along with the "preperation of hearts" and with the fact that when ever I read a description about the genderroles during sex, I actually get a headache.
In a way it's a form of advanced racism, not putting these things down to their race but to their culture...
Well, I'm from Mexico city, in my doubt is: Is it possible some girl from japan could want marry me? 
of course I know they need to know me first. but in this aspect how is the japanese culture?
that really leave me a hard task.
so, impossible because I think I will not go to japan...
It might be a good idea to get through a dinner or maybe a movie before you start ordering the wedding cake