So again they pull up their foreskins. Hans My Japanese girlfriend tells me that in that country circumcision is advocated on large-distribution newspapers' front pages. Ads encouragemales to shorten their foreskin in order to be more attractive for, or give a surprise to, their women. Circumcision seems to be an argument of common discussion among males and females, and seems to be rather fashionable. It also seems that the acceptable lenght of the foreskin is much shorter than in the West.
Short foreskins are common amongst Oriental men.
I would say 2-3 in 10 will need to be circumcised, which is usually done at late adolescence, as opposed to infant circumcision done in the US or the Muslim countries. There are boys who are circumcised when they are younger. In fact, my best friend whom I grew up with was circumcised at 7 due to phimosis. An interesting case is my cousin who moved to the US when he was only 4. I remember my aunt talking to my parents about getting my cousin circumcised over the dinner table when she visited us during the summer holidays one year.