The 2018 Top Challenge League was the second season of Japan's second-tier domestic rugby union competition, the Top Challenge League.
It was played from 8 September to 9 December 2018, with eight participating teams. NTT DoCoMo Red Hurricanes won the competition for the third time â having previously won in 2010âÂÂ11 and 2016âÂÂ17 and qualified for the promotion play-offs, along with Mitsubishi Sagamihara DynaBoars, Kintetsu Liners and Kurita Water Gush. Kamaishi Seawaves and Chugoku Red Regulions finished seventh and eighth respectively to qualify for the relegation play-offs.
In January 2017, the JRFU announced the format of the Top Challenge League competition. The competition was played in two stages. The First Stage was a round-robin format, where all eight teams played each other once.
The top four teams in the First Stage progressed to Group A of the Second Stage, while the bottom four teams progressed to Group B. Each of these groups was another round-robin, with all four teams playing each other once.
The four teams that competed in Group A progressed to promotion play-offs against the bottom four teams in the 2018âÂÂ19 Top League.
The two team that finished bottom and second-bottom of Group B progressed to the relegation play-offs, along with the winners and the runners-up of the Regional Challenge, held between the champions of the , and .
The following teams took part in the 2018 Top Challenge League competition:
The current standings for the 2018 Top Challenge League First Stage are:
The 2018 Top Challenge League First Stage fixtures are:
The standings for the 2018 Top Challenge League Second Stage Group A are:
The standings for the 2018 Top Challenge League Second Stage Group B are:
The matches played were: