Lewis Hamilton's race engineer: "Forecast is no more rain until the end of the race but low certainty."

How does he do it? Daniel Ricciardo finds grip where no one else can, passing Valtteri Bottas in the same place that he passed the other Williams of Felipe Massa. The Australian is up to fifth.

Lewis Hamilton takes half a second out of Mercedes team-mate Nico Rosberg and is now almost within one second.

Elsewhere, the Red Bulls are still flying, while the Williams struggle through a lack of downforce. Sebastian Vettel goes around the outside of Valtteri Bottas at the hairpin for fourth.

Nico Rosberg's race engineer: "Expecting light rain in eight minutes."

This lad Daniel Ricciardo really is something special. The Australian sells Felipe Massa, who is really struggling for grip, the dummy through the Esses and makes a move stick around the outside to get the inside going into Dunlop for sixth. Great racer's instinct.

Jennie Gow
BBC Radio 5 live pit-lane reporter

"Good news. FIA say there are only small and light showers to the south of the circuit."

Nico Rosberg sets the fastest lap of the race to extend his lead to 2.1 seconds over Lewis Hamilton. The Mercedes are lapping more than two seconds a lap quicker than anyone else.

Meanwhile, Sebastian Vettel passes Felipe Massa at the hairpin for sixth. Daniel Ricciardo tries his luck on the Williams, but he can't follow suit.

Nick Holland:, external Loving your comms BBC 5 live Tom Clarkson, Allan McNish on the Red Button Multiscreen - Best way to watch :-)

Got a big screen television? Why not switch to Red Button to watch the race via multiscreen and pretend that you are down on the F1 pitwall. Also available online by clicking the Live Coverage tab at the top of the page, but minus the pretending to be on the pitwall part.

Nico Rosberg regains the lead of the Japanese Grand Prix as Lewis Hamilton pits and rejoins behind his team-mate.

After the pit stops have shaken out, Jenson Button is the big winner having climbed up to third. Here's the top 10: 1) Ham 2) Ros 3) But 4) Bot 5) Mas 6) Vet 7) Ricc 8) Mag 9) Rai 10) Hul

Lewis Hamilton is pushing! But he's pushed too hard and gone off at Spoon curve. That mistake could cost him the chance to get back out ahead of Mercedes team-mate Nico Rosberg.

Nico Rosberg pits. Lewis Hamilton stays out there. Can Hamilton do enough on this lap to snatch the lead? Oh, the tension.

Jenson Button, meanwhile, is now up to third. What a call from the Briton and his McLaren team to pit for intermediates when the safety car came in.

Felipe Massa and Sebastian Vettel pit for intermediate tyres and rejoin in the same formation, however, Vettel gains a place as he comes out ahead of Red Bull team-mate Daniel Ricciardo, who stopped the lap before.

Jenson Button is up to eighth place, having been last. So it was a good move from McLaren. Meanwhile, Lewis Hamiton sets the fastest lap of the race to reduce the gap to leader Nico Rosberg to 1.6 seconds.

Gus Sette:, external Very brave move from Jenson Button pitting straight away for #Inters. Go Jenson!

Martin:, external Massive mistake by McLaren/Button coming in for inters. Can't see it being inspired.

It's super busy in the pit lane as several drivers react to Jenson Button's strong pace. Daniel Ricciardo and Valtteri Bottas are among those to switch to intermediates.

Jenson Button's race engineer: "Jenson you are matching the Mercedes, this is a good move."

Sergio Perez puts a move on Daniil Kvyat for ninth. Meanwhile, Sebastian Vettel has less success with an attempted pass on Kevin Magnussen for sixth and backs out of it.

Williams' Felipe Massa: "Conditions are so bad. So bad."

We're back under way, folks with Nico Rosberg leading Lewis Hamilton into Turn One. Jenson Button has rolled the dice and pitted for intermediates. Could that be an inspired move?

Some drivers may come in with the safety car and gamble on taking on the intermediate tyres. The frontrunners are unlikely to do so, but those in the midfield could feel it's worth the risk.