Transferring U.S. degree to Japan

Hi all, so currently I am working on my Associates degree in Radiologic Technology and my Phlebotomist certification. I am also learning Japanese because I plan to start the process of moving to Japan once I'm graduated (I have approximately 2yrs left in school). But I'm not too entirely sure how everything works as far as credentials transferring goes and whatnot. I'm still researching which city I want to live in but I'm leaning towards Osaka. Thank you to everyone who helps!!

by ComprehensiveBall664