Japan - Football League

The Japan Football League started from the 1999 season when the second division of J.League (J2) was also born. Until then, J.League consisted of only one division and the former JFL was the second highest division. Out of 16 teams who played the last season of the former JFL, 9 decided and were accepted to play in J2 and the other 7 teams as well as Yokogawa Electric, the winners of the Regional League Promotion Series, formed the new Japan Football League. These 8 teams together with Yokohama FC that was allowed to participate as a special case after the merger of Yokohama Flügels and Yokohama Marinos competed in the inaugural 1999 season.

The 9 teams that competed in the first season were as follows: Denso SC, Honda Motors, Jatco SC, Kokushikan University F.C., Mito HollyHock, Otsuka Pharmaceuticals, Sony Sendai, Yokohama FC and Yokogawa Electric.

In the second season the number of clubs was increased from 9 to 12, reaching 16 in 2001. In 2002 it was briefly 18 clubs before going back to 16 the next season and settling for good at 18 in 2006. For the 2012 season it had 17 clubs due to the late withdrawal of Arte Takasaki.

The league suffered another contraction after 2013 season, as 10 of its 18 teams joined the newly created J3 League. It also moved a tier down the pyramid, making it fourth-tier league since 2014.

Four former JFL clubs have competed in the top flight: Yokohama FC (2007, 2020, 2021 & 2023), Otsuka Pharmaceuticals (2014 & 2021 as Tokushima Vortis), Matsumoto Yamaga (2015 & 2019), and V-Varen Nagasaki (2018).