As an early follower of Mathematica, Akijiro Katsu is proud to have been a user of the first DOS and Windows versions.

Katsu worked for several years at a juku in Japan teaching students of all levels, including elementary and high school. In 1991, he joined Sumisho Electronics and served as a Mathematica technician and trainer. Katsu joined HULINKS in 2005, and now he regularly gives instructional talks about Mathematica at Japanese universities.