Gozo Shioda
The senshusei course was originally created in 1957 by Gozo Shioda, founder of Yoshinkan Aikido, to train the Tokyo riot police. The course has been available to non-police candidates since the 1980s, but was developed primarily for foreign students interested in becoming instructors starting in 1991. There are now two other versions of the course: a less-intensive version for participants aged 40 years or older, and a part-time version taking two years to complete.