There are 60 association football teams in the top three divisions of Japanese football, all of which have a manager (sometimes given the title of head coach) unless the position is currently vacant. The J1 League is the top tier, and consists of 20 clubs, while the remaining 40 clubs are split into two 20 team divisions: the J2 League and the J3 League.
Toru Oniki is currently the longest-serving manager in the top three divisions, having been appointed by Kawasaki Frontale in November 2016.
This list includes every manager currently managing a club in the J.League in order of the date that they were appointed.