I'm pretty sure that this is its racing livery from the Fuji 1000 Km race in 1999, the sole one for 25R in 1999!
You can see 3 driver names beside the door.
The only race where 3 drivers drove 25R was that particular one - M.Hitotsuyama / Y.Hitotsuyama / A.Iida
All other races of 25R were done with only two!