Why are braces uncommon in japan?

Question:

why are braces uncommon in japan? is it cause its expensive? is it because the japanese dont like it? or is because orthodonics isnt really avaliable in japan?

Answer:

One reason is that bracing is not covered by National Health Insurance of Japan.

You know all Japanese people are required to join NHI which covers most of health care cost when you become sick. This is basis of all health care in Japan.

But bracing is not covered by NHI. That means you have to pay a lot. I think government does not want to make it cover because bracing is not necessary to survive.

Yes, it's because it's expensive. But not just expensive, but because NHI does not cover it.