[Xanaphia]

First off, greetings all, I'm new here.
Sorry for this is a random question. I've been planning on going to Japan for years, and have even learned how to speak Japanese.
I just want to know if I would fit in size wise--
I am almost 16. I am about 5 ft. 2.5 inches tall and I weigh around 95 to 100 lbs,(it fluxuates at times). I wear a 0-1 in pants and xsmall/small in tops. My measurements are: 36B - 23.5 - 31.5 in.
Would I have a normal physique for Japan?
What size clothing would I fit in?