Hideki Matsuyama will head into Sunday with a slender one-shot lead in the Zozo Championship on home soil.
The 2021 Masters champion carded a 68 to remain a stroke clear of Cameron Tringale on 10 under in Chiba, Japan.
Matsuyama had looked set for a more comfortable night's sleep on Saturday, but a bogey six at the last coupled with a birdie on the same hole for Tringale cut his advantage.
Sebastian Munoz, Brendan Steele and Matt Wallace all sit on six under par, with Branden Grace and Tommy Fleetwood on the fringes of contention a shot further back.
Reigning Open champion Collin Morikawa's third-round 67 put him within six of the leader.
Round 3 leaderboard @ZOZOCHAMP:— PGA TOUR (@PGATOUR) October 23, 2021
1. Hideki Matsuyama (-10)
2. @CamTringale (-9)
T3. Sebastián Muñoz (-6)
T6. @BrandenGrace (-5)
8. @Collin_Morikawa (-4)