The Soysambu (20.33km) stage incorporated a pair of tricky water crossings and followed a very short road section. A lack of rain in the area nullified the risks associated with the water hazards, however, and a hard-charging Fourmaux clocked the early target time of 14min 16.1sec on only his third WRC event in a World Rally Car.
The Frenchman managed to claw 10.3 seconds back from team-mate Greensmith, as Ogier carded the quickest time of 14min 11.9sec and closed to within 43.5 seconds of Tänak in the battle for third place.
Katsuta was forced to slow for zebra on the track, as Neuville was third quickest and extended his overall advantage over the Japanese to 28.9 seconds.