In 1959 he started as an assistant in the radio engineering department of the Musashi Institute of Technology. He got a PhD in mathematics there in 1973.
In the late 1970s he met the photographer, who would become known as Erika Yasuda, at an S&M bar in Tokyo, and became her model and assistant. In 1984 the couple moved to New York where Yasuda became visiting professor at the Courant Institute at New York University, and later professor of mathematics and logic at the University of Maryland.
He also earned a Doctor of Sciences from Nagoya University for his contributions to descriptive set theory.
Erika died in 1987. Yasuda became Julia and moved to New York to work for The American Mathematical Society and The Association For Symbolic Logic.
In 1995 she met Antony Hegarty and began performing with Anthony and the Johnsons. She also produced and managed the group Transisters. In 1996 she was in Rosa von Praunheim’s film Transsexual Menace.
In 1999 she became a female US citizen. She is a participant in Milton Diamond’s study of Klinefelter’s Syndrome.
- Rosa von Praunheim (dir). Vor Transsexuellen wird gewarnt. Germany 78 mins 1996.
- “Julia Yasuda”. Anthony and the Johnsons. www.antonyandthejohnsons.com/julia/julia.html.