Pedrosa on top in Motegi practice
Dani Pedrosa led a works Honda 1-2-3 in second practice at Motegi, as the Japanese company targets a first home MotoGP win since 2004.
The Spaniard seized the initiative with 20 minutes to go, becoming the first driver to break the 1m47s barrier before immediately bettering his own mark to set a 1m46.790s, which stood for the remainder of the session.
For a time that put Pedrosa well clear of the field and indeed the previous lap record, a 1m47.091s set by Casey Stoner in 2008.
It was Stoner who came closest to deposing Pedrosa, moving to within 0.054s of his team-mate with four minutes to go.
That late improvement knocked last year's polesitter Andrea Dovizioso into third, with the Italian also under lap record pace.
Gresini Honda's Marco Simoncelli ended the session in fourth, his best effort coming in the very early stages of the session.
Jorge Lorenzo was the top Yamaha rider in fifth, the reigning champion finishing 0.520s down.
Lorenzo's team-mate Ben Spies struggled with illness, leaving his bike to visit the medical centre with 15 minutes to go and finishing down in 14th.
The pair were split by the second Gresini Honda of Hiroshi Aoyama, who was the last rider to finish within 1s of Pedrosa.