////Not Japan... China./////

I checked a couple of on-line sources shown below but I first read it in a book I have somewhere but I'd have to dig it out from wherever I put it.


"It is said that - in Europe and USA - about 3% of the population are AP possessors. When one selects persons who are professional or semi-professional musicians (e.g., students at music conservatories), about 8% AP possessors are found in that group [57], [62]. Most remarkably, however, in Japan nearly 70% of students at music conservatories are AP possessors (Miyazaki, 1988a )."

http://www.mmk.ei.tum.de/persons/ter/top/absolute.html

Other research has shown that the prevalence of perfect pitch is higher in Japan [than China or Vietnam], where the language is not tonal, but where many young children receive Suzuki music training.

http://www.perfectpitchpeople.com/language.htm