I was reminded about the presence of Japanese beat boxing when I saw this video on the Daily Dish:
I had a look for Hikakin, the featured beat boxer above, and he even does his version of "Crazy Japanese stuff", including:
CC Lemon Strong (Sparkling Strong)
Cherry Cola (in Japan!)
But in addition to doing his reviews of Japanese sundries, he has a bunch of beat boxing videos:
Also some collabs. In these two cases with (and against) Daichi
And from looking around on Hikakin's channel, I find AIBO! She's got crazy skills!
So there you go. Japanese male and female beat boxers! Whodathunkit?