Suzuka - Red Bull driver Daniil Kvyat had the quickest lap in a wet second practice session for the 2015 Japanese GP.
Kvyat clocked 1min49.277seconds, 0.023 seconds ahead of Mercedes driver Nico Rosberg with his team mate Lewis Hamilton half a second back in third.
With rain falling at the Suzuka circuit several drivers complained about aquaplaning.
Tough session
Kvyat's team mate Daniel Ricciardo was fourth followed by the Ferrari pair of Sebastian Vettel and Kimi Raikkonen.
Rain also hit the morning session when Toro Rosso driver Carlos Sainz Jr. had the fastest time.
Sainz was seventh in the second morning session followed by team mate Max Verstappen. Sauber's Felipe Nasr and Lotus driver Pastor Maldonado completed the top 10.
2015 Japanese Grand Prix 2nd practice results
1 Daniil Kvyat (Russia) Red Bull - Renault 1min48.277
2 Nico Rosberg (Germany) Mercedes 1min48.300
3. Lewis Hamilton (Britain) Mercedes 1min48.853
4 Daniel Ricciardo (Australia) Red Bull - Renault 1min49.097
5 Sebastian Vettel (Germany) Ferrari 1min50.268
6 Kimi Raikkonen (Finland) Ferrari 1min50.319
7 Carlos Sainz Jr (Spain) Toro Rosso - Renault 1min50.418
8 Max Verstappen (Netherlands) Toro Rosso - Renault 1min50.542
9 Felipe Nasr (Brazil) Sauber - Ferrari 1min50.968
10 Pastor Maldonado (Venezuela) Lotus - Mercedes 1min51.557
11 Nico Hulkenberg (Germany) Force India - Mercedes 1min51.674
12 Jenson Button (Britain) McLaren 1min51.861
13 Marcus Ericsson (Sweden) Sauber - Ferrari 1min51.934
14 Sergio Perez (Mexico) Force India - Mercedes 1min52.070
15 Romain Grosjean (France) Lotus - Mercedes 1min52.534
16 Felipe Massa (Brazil) Williams-Mercedes 1min52.765
17 Fernando Alonso (Spain) McLaren 1min55.239
18 Will Stevens (Britain) Marussia - Ferrari 1min58.059
19 Alexander Rossi (US) Marussia - Ferrari 1min59.419
20 Valtteri Bottas (Finland) Williams-Mercedes