There is a cultural phenomenon that can explain why you can see that many Japanese people have crooked teeth.

In many western countries, such as the United States, crooked or uneven teeth are considered as defects. Let's go to an orthodontist or a plastic surgeon to correct these defects. However, in Japan, they prefer "Yaeya"-that is, "buck teeth" as everyone thinks-because the Japanese find "Yaeya" cute and charming.

In order to better understand this, because Japanese aesthetic culture prefers those delicate and lovely girls. Japanese idols are generally pure and lovely, and it is difficult to see mainstream Japanese celebrities look sexy. Buckteeth give women a childish feeling, which many Japanese men and women like.