I must admit I didn't understand much, or let's better say that I'm not sure of the accuracy of the info that are following. My concern is that I tried to reach Mr. Akio Takamura and failed. So, here is what I assume, but cannot confirm (and if a reader can bring more precisions, he'll be welcome!):
Akio Takamura is a Japanese artist from the Saitama province, who makes/made beautiful nose flutes colorings on clay nose flutes made and provided by Morinotami (Nature Factory - Forest Tribe).
Morinotami produces those great flutes :
And Akio Takamura painted his own ones, with more stylized and modern patterns :