2004 Japan Football League

The 2004 Japan Football League (第6回日本フットボールリーグ) was the sixth season of the Japan Football League, the third tier of the Japanese football league system.

Overview
It was contested by 16 teams, and Otsuka Pharmaceuticals won the championship.

Promotion and relegation
Because of promotion of Otsuka Pharmaceuticals and Thespa Kusatsu and expulsion of Kokushikan University, no relegation has occurred. After the season, Honda Lock, Mitsubishi Motors Mizushima and Ryutsu Keizai University were promoted from Regional Leagues by the virtue of their placing in the Regional League promotion series.