DateRGospodarze v Goście-
04/28 05:30 - Green Rockets v Toyota Industries 14-17
04/28 03:00 - Kyuden Voltex v Kamaishi Seawaves RFC 42-32
04/27 05:30 15 Wild Knights v Kintetsu Liners 33-24
04/27 05:30 15 Toyota Verblitz v Canon Eagles 35-31
04/27 05:30 15 Kubota Spears v Honda Heat 61-24
04/27 05:30 15 Kobelco Steelers v Shizuoka Blue Revs 63-19
04/27 03:05 15 Toshiba Brave Lupus v Suntory Sungoliath 36-27
04/27 03:00 15 Mitsubishi Dynaboars v Black Rams 24-31
04/21 05:30 14 Kintetsu Liners v Black Rams 34-23
04/21 04:00 14 Kubota Spears v Kobelco Steelers 39-29
04/21 03:10 14 Honda Heat v Toshiba Brave Lupus 7-8
04/20 05:30 - Urayasu D-Rocks v Toyota Industries 57-20
04/20 05:30 14 Toyota Verblitz v Wild Knights 7-40
04/20 05:30 14 Canon Eagles v Mitsubishi Dynaboars 43-19
04/19 10:00 - Red Hurricanes v Kamaishi Seawaves RFC 21-18
04/19 10:00 14 Suntory Sungoliath v Shizuoka Blue Revs 31-31
04/14 05:30 13 Toshiba Brave Lupus v Kobelco Steelers 40-40
04/13 05:30 13 Mitsubishi Dynaboars v Toyota Verblitz 20-34
04/13 05:30 13 Suntory Sungoliath v Honda Heat 60-10
04/13 05:00 13 Shizuoka Blue Revs v Kubota Spears 31-31
04/12 10:00 13 Kintetsu Liners v Canon Eagles 33-52
04/12 10:00 13 Black Rams v Wild Knights 26-50
04/07 05:30 12 Kobelco Steelers v Suntory Sungoliath 27-36
04/07 05:30 12 Kubota Spears v Toshiba Brave Lupus 20-22
04/06 05:40 12 Toyota Verblitz v Kintetsu Liners 47-30
04/06 05:30 12 Wild Knights v Mitsubishi Dynaboars 53-12
04/06 05:00 12 Shizuoka Blue Revs v Honda Heat 43-14
04/06 04:00 12 Black Rams v Canon Eagles 12-31
03/31 05:30 - Red Hurricanes v Kyuden Voltex 14-30
03/24 05:30 11 Toshiba Brave Lupus v Black Rams 40-33

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 to rozgrywki ligowe rugby union w Japonii, założone w 2022 roku. Liga składa się z 12 drużyn, które rywalizują o tytuł mistrza Japonii. Mecze odbywają się na stadionach w różnych miastach Japonii.

Liga jest podzielona na dwie dywizje: Division 1 i Division 2. Drużyny w Division 1 grają o mistrzowski tytuł, a drużyny w Division 2 walczą o awans do Division 1.

Japonia - Rugby League One jest uważana za jedną z najsilniejszych lig rugby union w Azji. Przyciąga ona uwagę najlepszych japońskich zawodników, a także zagranicznych graczy z całego świata.