i'd like to jump in on this discussion.
im a former US service member who was stationed in Japan for almost 3 years and i'm going back in August, as a civilian, to study at a university.
i have to agree with Bryce and the other comments. if you're thinking of joining the military purely to date/marry a japanese woman, i would strongly reconsider your reasons for joining the military.
it's not impossible to get stationed in Japan, but it's not like you will have any kind of guarantee or input on where they send you. no matter what a recruiter tells you. once you sign the papers, you basically belong to the military. they might send you to Japan for a day and then tell you you're being deployed tomorrow to some place else, and there isnt anything you can do about it.
assuming you join any of the branches and get lucky enough to be assigned to a duty station in Japan, you're going to find the full spectrum of women and men in Japan.
Yes, some Japanese are interested in Americans and, yes, there are plenty of Japanese people who will avoid Americans like the plague.
yes, dating among service members and japanese nationals does happen and they can be just as strong, healthy and happy relationships as anywhere in the world.
they can also be the hardest relationships in the world to maintain. consider the cultural differences, language barriers, historical grudges, and the fact that at any moment you could be deployed and have to leave your partner.
ultimately, i think this discussion comes down to you. you said you're 17, right? I consider you still "young" and you have plenty of time to meet people and make friends before worrying about marriage. but that's just my opinion.
also, you may what to reconsider referring to women as "chicks" and "creatures"..
im not trying to dissuade you from dating in Japan. the only reason i felt like i could contribute to this thread is because i was a service member in japan and i have been dating a woman from Japan for over 3 years and we are very happy together (despite the current long distance).
honestly, this question is so vague and misguided that it's impossible to give a clear answer. it all depends.
it's like saying, "my friend watched the movie JAWS, and he told me that if I go the ocean, a giant shark is definitely going to eat me." do you see how ridiculous that sounds? there are literally infinite possibilities of what could happen to you if you join the military, and end up going to Japan, good and bad, and basing your question off of one scenario is the wrong way to go about it.
i wish you the best of luck in your search. it's not impossible, but i wouldn't recommend trying to find your soul-mate by "using" the military, its typically more difficult than some people are willing to deal with.
good luck.