The 2023–24 Japan Rugby League One – Division 1 season is the thirteenth top flight league season played from December 2023 through to May 2024,[1] in the newly rebranded Japan Rugby League One. The competition consisted of twelve teams, including one promoted team from Division 2, the Mie Heat.
The format and schedule was announced on 6 September 2023. It will consist of a round-robin fixture, before entering into a knockout style play-off for the final four teams. It featured two conferences (A, B). Teams in each conference played the teams in their respective conference twice (one at home, one away), and six matches against all the teams in the other conference, three being at home and three away. Each team played a total of sixteen seasonal fixtures, plus additional play-off matches, including relegation play-offs.[2]
Updated to match(es) played on unknown. Source: league-one.jp Rules for classification: 1) Points; 2) Number of wins; 3) Point difference (C) Champion; (O) Play-off winner(s); (R) Relegated
^"NTT Japan Rugby League One 2023-24 Division 1" [NTT Japan Rugby League One 2022–23, Divisional and Conference Organisation (Updated)]. league-one.jp (in Japanese). Japan Rugby League One. 1 August 2022.