DateRGazde v Oaspeti-
05/07 05:30 16 Toyota Verblitz v Sungoliath DBFA
05/07 05:30 16 Black Rams v Red Hurricanes Postponed
05/01 08:00 15 Toshiba Brave Lupus v Sungoliath 27-3
05/01 05:30 15 Kobelco Steelers v Canon Eagles 42-33
05/01 05:30 15 Red Hurricanes v Shizuoka Blue Revs Postponed
05/01 05:30 15 Green Rockets v Wild Knights 10-39
05/01 03:00 15 Kubota Spears v Shining Arcs 40-13
04/30 04:00 15 Black Rams v Toyota Verblitz 17-64
04/24 05:30 14 Sungoliath v Black Rams 30-3
04/24 05:30 14 Green Rockets v Shining Arcs 34-38
04/23 08:00 14 Shizuoka Blue Revs v Toyota Verblitz 15-18
04/23 05:30 14 Canon Eagles v Wild Knights 24-33
04/23 03:00 14 Kubota Spears v Kobelco Steelers 40-32
04/22 10:00 14 Toshiba Brave Lupus v Red Hurricanes 35-7
04/17 05:30 13 Green Rockets v Kubota Spears 41-71
04/17 05:05 13 Sungoliath v Shizuoka Blue Revs 56-27
04/16 08:00 13 Red Hurricanes v Toyota Verblitz 25-38
04/16 05:30 13 Wild Knights v Kobelco Steelers 37-31
04/16 05:30 13 Black Rams v Toshiba Brave Lupus 22-43
04/15 10:00 13 Shining Arcs v Canon Eagles 5-35
04/10 05:30 12 Kobelco Steelers v Green Rockets 57-28
04/10 05:30 12 Toyota Verblitz v Toshiba Brave Lupus 31-53
04/09 05:30 12 Kubota Spears v Canon Eagles 21-30
04/09 05:30 12 Shizuoka Blue Revs v Black Rams 45-19
04/09 05:30 12 Wild Knights v Shining Arcs 31-24
04/09 03:00 12 Sungoliath v Red Hurricanes 42-3
03/27 05:30 11 Green Rockets v Toyota Verblitz 10-36
03/27 05:30 11 Shizuoka Blue Revs v Wild Knights 25-26
03/27 05:30 11 Kobelco Steelers v Toshiba Brave Lupus 35-46
03/27 05:30 11 Shining Arcs v Black Rams 42-12

Japan Rugby League One (formerly the Top League) is a rugby union competition in Japan. It is the highest level of professional rugby competition in the country. The Japan Rugby Football Union created the competition in 2003, by absorbing the Japan Company Rugby Football Championship, to drive up the overall standard and popularity of the sport and improve the results of the Japan national rugby union team. The chief architect of the league was Hiroaki Shukuzawa who strongly felt the urgency of improving Japanese domestic company rugby to a professional level which would allow Japan to compete more convincingly at Rugby World Cups.

Until 2022, it was an industrial league, where many players were employees of their company and the teams were all owned by major companies. While the competition was known for paying high salaries, only world-class foreign players and a small number of Japanese players played fully professionally, which meant most of the players still played in an amateur capacity. The delayed 2021 season was the final season of the Top League, with the JRFU adopting a new fully-professional three-tier system from 2022. More details about the new structure was announced to the media in January 2021. Featuring 25 teams, the 12 top-tier clubs would be split into two conferences, with seven teams competing in division two and six in division three. The new competition was formally announced as Japan Rugby League One in July 2021.

The first season in 2003–04 featured 12 teams. The league was expanded to 14 teams in 2006–07 and 16 teams in 2013–14. The Top League is played during the off-season of the Super Rugby, Therefore, many full-time foreign professionals from Southern Hemisphere countries have played in the Top League, notably Tony Brown, George Gregan and Dan Carter. In the 2010s, salaries in the Top League have risen to become some of the highest in the rugby world; in 2012, South Africa's Jaque Fourie, now with Kobelco Steelers, was widely reported to be the world's highest-paid player.

Japonia - Rugby League One este cea mai importantă competiţie de rugby din Japonia, fiind compusă din 12 echipe. Liga a fost înfiinţată în 1998 şi este considerată una dintre cele mai puternice ligi de rugby din Asia. Echipele din Rugby League One reprezintă unele dintre cele mai mari oraşe din Japonia, inclusiv Tokyo, Osaka şi Nagoya. Sezonul Rugby League One se desfăşoară din ianuarie până în mai, iar echipele joacă câte 11 meciuri în sezonul regulat. Cele mai bune opt echipe din sezonul regulat se califică pentru play-off, iar câştigătoarea este încoronată campioană a Japoniei.