Earlier in the day, Russell led Antonelli by 0.026secs in the first hour’s session.
And Mercedes’ apparent superiority was underlined on the race-simulation runs late in the second session, with Antonelli leading the way from Russell and no one else within within 0.5secs on average.
Both Ferrari drivers seemed to be struggling for grip. Leclerc suffered some wobbles through the Esses and ran off track at Spoon Curve later on, while Hamilton complained he was “slow because I’ve got no confidence in the car”.
Norris’ early problem was a hydraulics failure, which McLaren fixed after half an hour.
He was far from the only driver to have problems. Racing Bulls’ Arvid Lindblad took no part because of a gearbox problem that required a new part, while Audi’s Gabriel Bortoleto spent nearly three-quarters of the session in the garage with an unspecified technical problem.
And Cadillac’s Sergio Perez also missed about half the session while the team repaired floor damage caused by a collision with Williams’ Alex Albon in the first session.
Fernando Alonso had his first taste of Suzuka this year in the second session, after American reserve driver Jak Crawford drove in the first.
The veteran Spaniard, who arrived late in Japan following the birth of his first child, was 19th fastest, two places and 0.355secs ahead of team-mate Lance Stroll.
