The 2023 Rally Japan (also known as the FORUM8 Rally Japan 2023) was a motor racing event for rally cars held from 16 to 19 November 2023. It marked the eighth running of the Rally Japan, and was the final round of the 2023 World Rally Championship, World Rally Championship-2 and World Rally Championship-3. The event was based in Nagoya in Chà «bu Region and was contested over twenty-two special stages covering a total competitive distance of .
Thierry Neuville and Martijn Wydaeghe were the defending rally winners. Hyundai Shell Mobis WRT, were the defending manufacturers' winners. Grégoire Munster and Louis Louka were the defending rally winners in the WRC-2 category.
Elfyn Evans and Scott Martin won their second rally of the season. Their team, Toyota Gazoo Racing WRT, were the manufacturer's winners. Andreas Mikkelsen and Torstein Eriksen won the World Rally Championship-2 category, while Kajetan Kajetanowicz and Maciej Szczepaniak won the 2023 WRC-2 Challenger title. Jason Bailey and Shayne Peterson won the World Rally Championship-3 category.
The following crews entered into the rally. The event was opened to crews competing in the World Rally Championship, its support categories, the World Rally Championship-2, World Rally Championship-3 and privateer entries that were not registered to score points in any championship. Nine entered under Rally1 regulations, as were ten Rally2 crews in the World Rally Championship-2 and one Rally3 crew in the World Rally Championship-3.
All dates and times are JST ().