Rugby - Japan League
The national club championship of Japan was inaugurated in northern hemisphere season 2003/04 as the "Top League". The tournament was not staged in 2020 due to the Covid 19 pandemic. From 2021/22 it has been called Japan Rugby League One.
| YEAR | WINNERS | RUNNERS-UP |
| 2004 | GREEN ROCKETS | Brave Lupus |
| 2005 | BRAVE LUPUS | Jubilo |
| 2006 | BRAVE LUPUS | Sungoliath |
| 2007 | BRAVE LUPUS | Sungoliath |
| 2008 | SUNGOLIATH | Wild Knights |
| 2009 | BRAVE LUPUS | Wild Knights |
| 2010 | BRAVE LUPUS | Wild Knights |
| 2011 | WILD KNIGHTS | Sungoliath |
| 2012 | TOULOUSE | Wild Knights |
| 2013 | CASTRES | Brave Lupus |
| 2014 | WILD KNIGHTS | Sungoliath |
| 2015 | WILD KNIGHTS | Jubilo |
| 2016 | WILD KNIGHTS | Brave Lupus |
| 2017 | SUNGOLIATH | Wild Knights |
| 2018 | SUNGOLIATH | Wild Knights |
| 2019 | STEELERS | Sungoliath |
| 2020 | Not held | - |
| 2021 | WILD KNIGHTS | Sungoliath |
| 2022 | WILD KNIGHTS | Sungoliath |
| 2023 | SPEARS | Wild Knights |
| 2024 | BRAVE LUPUS | Wild Knights |
| 2025 | BRAVE LUPUS | Spears |
| 2026 | STEELERS | Spears |
| Final Venues: | |
| National Stadium, Tokyo | 2004, 2022, 2023, 2004, 2025, 2026 |
| Chichibunomiya, Tokyo | 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 |
| Links to other Rugby |