Ayu's blood

[masa]

I think it's not likely at all that her father was an American or other Caucasian man. Because if so, avex would have mentioned the fact in her biography in her official site. It's regarded cool in Japan that an artist has a Caucasian father or mother (for example, Tsuchiya Anna), and avex should have surely used the fact to promote her. Another reason is that if so, she should have mentioned that in the program of "All Night Nippon" or in the interview of "ROCHIN' ON JAPAN", where she was telling her past so surprisingly honestly. But in fact, she said no such things at all then.
But I don't deny the possibility that her grand parent or grand grand parent was a foreigner.