This text will, admittedly, be challenging to use IF your proficiency in Japanese has yet to have reached the point to where you can fully digest the material within its pages properly. If it is sufficient, however, you will NOT find a more comprehensive and useful text on the U.S. market for beginning about the challenging process of acquiring a strong understanding of "advanced" Japanese grammar. I purchased my copy when it first hit the shelves in Japan and still reference it today. It is a fantastically well-done work of scholarship!
I do not make this assertion lightly. I have taken and passed Grade 1 (1 kyuu) of the Japanese Language Proficiency Test and enjoyed the great blessing of having had been able to have had trained in Japanese (the school's first language) at the Defense Language Institute in beautiful Monterey, California (Where I, incidentally, earned my first degree and became a DOD-certified Japanese linguist).
Please remember. . . Japanese is not like Spanish or French. It takes a VERY considerable investment of time, effort, and personal treasure (or, if you live a charmed life, that of your sponsor's) to acquire a functional proficiency in it--still more, for a working proficiency. Don't rush it. Just as you have to go through the basics in mathematics before graduating into algebra and beyond, so too, must you in your language studies (all the more, if that language happens to be Japanese, Korean, Arabic, Pashto, or Chinese!). If you try to hit the highway too soon, you will likely wipe yourself out. (You could become discouraged or, worse still, get into the habit of speaking atrociously bad Japanese, because you haven't properly mastered the basics yet.)