2023 Japanese motorcycle Grand Prix

The 2023 Japanese motorcycle Grand Prix (officially known as the Motul Grand Prix of Japan) was the fourteenth round of the 2023 Grand Prix motorcycle racing season. It was held at the Mobility Resort Motegi in Motegi on 1 October 2023.

After Somkiat Chantra's win in the Moto2 class, Kalex secured its eleventh straight Constructors' Championship.

Combined Free Practice 1-2
Free Practice sessions on Friday and Saturday do not determine riders to qualify for Q2.

Practice session
The top ten riders (written in bold) qualified for Q2.

Combined Practice 1-2-3
The top fourteen riders (written in bold) qualified for Q2.

Combined Practice 1-2-3
The top fourteen riders (written in bold) qualified for Q2.

MotoGP Sprint
The MotoGP Sprint was held on 30 September.
 * Álex Rins competed during the Friday practice sessions, but withdrew from the race citing right leg pain. He was replaced by Stefan Bradl for the rest of the weekend.

MotoGP
Jack Miller set the best time 1:46.047 and was the fastest rider at this session ahead of Marc Márquez and Fabio Quartararo.

MotoGP
The race, scheduled to be run for 24 laps, was red-flagged during lap 13 due to adverse weather conditions on the track. The race was supposed to be restarted over the remaining 12 full laps with the grid based on the classification after lap 12. However, the race was again red-flagged during the warm-up lap of the second race, and race direction decided not to start the race again. Per regulations, full points were awarded since 50% or more of the original race distance (i.e. 12 full laps) were completed.
 * Johann Zarco crashed out during lap 13, but was able to return to the pits when the race was red-flagged. However, he was deemed ineligible to restart the race for returning to the pits in an improper manner (i.e. using a shortcut). Thus, he was not classified for the final results despite finishing sixth in lap 12 (the lap where the final results were based).

Championship standings after the race
Below are the standings for the top five riders, constructors, and teams after the round.

MotoGP

 * Riders' Championship standings


 * Constructors' Championship standings


 * Teams' Championship standings

Moto2

 * Riders' Championship standings


 * Constructors' Championship standings


 * Teams' Championship standings

Moto3

 * Riders' Championship standings


 * Constructors' Championship standings


 * Teams' Championship standings