Japanese women love boots, and loved them also when I was there 3 years ago. Nowadays the clothes fashions have changed, though, and they wear them with tiny little shorts. The funniest I've seen was a girl with huge boots, tiny shorts, and a fur hat that belonged in a Hollywood movie about Russia in winter. It was +23 that day.
Joy and Mikko said that there is a short time in July when people don't wear boots.
But the most mysterious thing about Japanese fashion is their high heels. More than half of the women there wear high heels, and the vast majority of them have no idea how to walk on them. This is what's so mysterious: if you use high heels every day, wouldn't you eventually either learn to walk on them or give up? I've heard a few theories on the subject, but they all would apply to Russian women as well, but Russian women don't stagger on their heels in such numbers: they either learn or give up. The Japanese, amazingly, continue to stagger.