"Some cities are women's cities where the women always look really good. Like New York is a women's city, Paris is a women's city - Tokyo is a men's city. I think the guys look much better here." - The Sartorialist
I always thought the men's fashion in Tokyo was very unique, interesting and fashion-forward. But the women's fashion there, in general, is more the "kawaii" style with lots of cute patterns, frilly skirts, lace etc. Not exactly my thing which is why I mostly shopped at Zara or H&M whilst living there. Let's not forget about hair and makeup in Japan which is another whole separate topic.
I definitely preferred the men's fashion there, in the sense that if I were a guy I would've wanted to learn a thing or two from the Tokyo fashion scene - just the fashion.