Recently I bought a book, 'The Truth of Sagawa-den Daitoryu Aikijujitsu' by Takhashi Masaru shihan. As far as I know, Sagawa
sohan didn't accept any foregin student beside Paul Wollos.
In the book, there are many photos but some photos were quite interesting. Because Sagawa sohan was applying techniques to a foreign looking girl(around 18~20 years old..) Subtitle says it was a training session with 'Japan Culture Women's College Daitoryu Aikijujitsu-kai' The girl was wearing black belts. So it seems she spent much time at Sagawa or other dojo.
She could be half japanese? or There is no rule without exceptions?
ps. how's Sagawa dojo thesedays? still nobody knows?
If we are reading the same book, on p.113 there is an explanation. The young lady is named Jennie enrolled in the Sagawa Dojo after coming to Japan from Australia. The group photograph is of the students in the Tokyo Gakugei Daigaku Aiki-bujutsu club.