I can't really tell what you are looking for here, where you are located, what your age is, and what age of a Japanese girl you are looking for. Generally, every additional hurdle you place in front of meeting that right person makes it exponentially harder to find that person. If you are in your 30s and looking for the same, and are in Japan and speak some Japanese and don't require a girl to be a virgin, you likely won't have much of a problem finding someone that's interested in you. If you are from France or Italy you might even find someone very interested in relocating back to Europe.
If you are looking for an early 20s Japanese kawaii goddess who is also a virgin, speaks great <insert your native language here> and is willing to have a long distance relationship with you until you can marry her, you are probably SOL. I'm not saying its impossible, but you should know that (actual) chastity isn't really that big of a virtue in Japan, and I'd say most women that are interested in traveling or living internationally are sexually experienced. Unless you find a rare strict Japanese Catholic, I'd say you have a fairly unreasonable goal, if that's what you are looking for.