Iwaki FC won the J3 title for the first time in their history, in their debut campaign at the J3 League, just a year after being promoted from the JFL.
The 4 teams relegated from J2 League in 2021 were: SC Sagamihara, Ehime FC, Giravanz Kitakyushu and Matsumoto Yamaga.
Fukushima team are making their debut in the J3 League after obtaining a J.League License, to enable their promotion from the JFL.
From the 2021 season onwards, there is no limitations on signing foreign players, but clubs could only register up to five of them for a single matchday squad.
[9] Players from J.League partner nations (Thailand, Vietnam, Myanmar, Malaysia, Cambodia, Singapore, Indonesia, and Qatar) were exempted from these restrictions.