The 2023 FIA World Rally Championship was the fifty-first season of the competition organised by the Fédération Internationale de l'Automobile (FIA) as the highest class of international rallying. Teams and crews competed for the World Rally Championships for Drivers, Co-drivers and Manufacturers. Crews were free to compete in cars complying with Groups Rally1 to Rally5 regulations; however, only manufacturers competing with Rally1 cars homologated were eligible to score points in the manufacturers' championship. The championship began in January 2023 with the Monte Carlo Rally and concluded in November 2023 with the Rally Japan. The series was supported by the World Rally Championship-2 and World Rally Championship-3 categories at every round of the championship and by the Junior World Rally Championship at selected events.

Rally Japan (ラリージャパン) is a rally competition held in Hokkaidō, Japan. The event made its debut in the FIA World Rally Championship during the 2004 season. From 2004 to 2007, the event was held on the twisty and narrow gravel roads of the Tokachi region near Obihiro. For the 2008 season, the event was moved to the region close to Sapporo, Hokkaidō's main city. Rally Japan was not held in 2009, but returned in 2010 for one year. Rally Japan was planned to return in 2020 to the new location of Nagoya, but was cancelled on August 19 due to COVID-19 pandemic in Japan. It was cancelled again in 2021, and returned as the last rally of the season in 2022.