Junichi is a wood shop teacher in the Sket Dance franchise.
Junichi Son is created by Kenta Shinohara; he has no information regarding any inspiration used to create him. It's assumed that he is loosely based on Jason Voorhees, Friday the 13th's serial killer. He first appears in volume 6: chapter 48 and episode 15. His Japanese actor is Jurota Kosugi.
In addition to his wood cutting skills, J-Son can make sound effects such as the sound of a chain saw or crows.