Greetings from the Japan Alps, Bianca san, and welcome to JREF !
I too, will say that there's not that much to worry about, really, and better than worrying, trying to apply creative thinking (along the lines of what nice gaijin has touched on) little by little will be good to. You have made one good choice of joining up here on JREF. We are a world-wide on-line community, and there are some members in that general area of Japan as well.
I am married to a little Japanese girl, and we have three monsters (otherwise boys). It will take some getting used to living here, but by doing some on-line checking out about the area, working on learning whatever degree of Japanese you can (and your hubby can help there, I'm sure), and trying to communicate with his family here, in whatever way....by sending cards, or writting letters...even if it's all in English...it's the thought that counts. In otherwords, making connections, little by little, one step at a time.
Think positive, and try to push yourself in that direction. If your depression is of the clinical type, it might be good to read up on it, know it well, and find ways to handle it as best you can too. It can be done; 'tis not impossible...the brain does have some degree of flexibility !! I wish you the best !! MM