[3] The 2017 season started on 11 March, then ended on 3 December.
Blaublitz Akita won their first title as a J.League club.
Oita made an immediate return to the J2 League after being relegated in 2015.
Kitakyushu competed in the third tier for the first time under the J3 League name.
Azul Claro Numazu made their debut in the third tier as a club.