No, AOS is not related to K-1 in this case.
K-1 is only for fiance, but you're already married.
Plus if adjusting status, you're not getting any visa.
Before making this important decision, please consult with your spouse and make sure she understands the implications of not being to easily travel back or not being able to work while waiting for GC. Especially if they have elder parents, kids etc back in Japan.
Another important aspect of adjustment is being able to sponsor the immigrant. Please check if your income meets the requirements for I-864, and if not, you need to find a joint sponsor.