The Fuji round of the 2018/19 World Endurance Championship season will move forward a week to allow Fernando Alonso to race there and avoid a Formula 1 clash.
Series organisers confirmed the move - which means the Fuji race clashes with the Petit Le Mans IMSA SportsCar Championship finale but not F1's United States Grand Prix - on Friday, ahead of the unveiling of the entry lists for the Le Mans 24 Hours and upcoming WEC superseason.
After the announcement that Alonso will be racing for Toyota at all WEC rounds that do not clash with his McLaren F1 commitments, it emerged that Fuji had requested a change of date.
The Japanese race was first scheduled for October 12-14, but the WEC pushed back the race by a week in its latest 2018/19 calendar draft to avert an unpopular clash with Petit Le Mans.
But Fuji has now been granted its request to move back to its original date, allowing star signing Alonso to race at Toyota's home venue.
The championship's decision to create a fresh Petit Le Mans clash is likely to go down badly with the numerous WEC drivers who had also planned to contest the IMSA event.
These include another of Toyota's drivers, Mike Conway, along with the likes of Rebellion's Bruno Senna, DragonSpeed's Renger van der Zande, Ford pair Harry Tincknell and Olivier Pla and several members of BMW's factory GTE squad.