Red Bull’s Max Verstappen, his car sporting an aerodynamic upgrade that featured new side pods, floor and engine cover, was seventh fastest, 0.791secs off the pace.
Both Verstappen and Norris were among the drivers to run wide at Spoon, where a tailwind on entry was causing problems.
Racing Bulls’ Liam Lawson and Arvid Lindblad were eighth and 10th, sandwiching the Haas of Esteban Ocon.
Williams’ Alex Albon had a torrid session, running off track and hitting the wall at Degner Two, traditionally one of the track’s most demanding corners, midway through the session, before a spin after colliding with Cadillac’s Sergio Perez, who appeared not to see Albon on the inside as the British-born Thai dived down the inside at the chicane.
The two Aston Martins brought up the tail of the field on a weekend on which engine partner Honda want to show improvement on its home track after a dire start to the season.
American reserve driver Jak Crawford, completing one of the team’s mandatory young driver days, was in Fernando Alonso’s car and was 22nd, just over a second slower than Lance Stroll.
Honda have introduced some changes that are hoped to address the engine-vibration issues that have been causing reliability problems and major discomfort for the drivers.
Aston Martin also have an aerodynamic upgrade for Japan, featuring a new engine cover and front-of-floor furniture.
