I won't venture to write an article on what characterizes the physics of Japanese women. This is the kind of slippery subject on which it's a challenge not to crash.
The Japanese woman crystallizes many fantasies and raises many questions, from outside of Japan. They sometimes say she's subdued and shy, but also superficial and even venal. It's impossible to speak about Japanese women without making a generalization, thus distorting their variety.
That on which many agree, however, is the purity of her face, her slimness, elegance, and of course her fashion sense. As for me, I will stick with these pictures of Japanese girls and women taken during my travels in Japan.