The 1989 Japanese Grand Prix (formally the XV Fuji Television Japanese Grand Prix) was a Formula One motor race held at Suzuka Circuit, Japan, on 22 October 1989. It was the 15th and penultimate round of the 1989 Formula One season. The 53-lap race was won by Alessandro Nannini for the Benetton team, from a sixth position start. Riccardo Patrese finished second for the Williams team, with Thierry Boutsen third in the other Williams car. It was Nannini's only win. The race is one of the most controversial in F1 history, as the culmination of Alain Prost and Ayrton Senna's tumultuous two-year rivalry as teammates at McLaren. The Japanese Grand Prix decided the 1989 Drivers' Championship in Prost's favour, after a collision on lap 47 at the final chicane between him and Senna put them both off the track. While Prost abandoned his stalled car, Senna restarted his, made a pit stop to change his front wing, and overhauled Alessandro Nannini to take victory. Following the race Senna was controversially disqualified for getting a push start from the marshals to rejoin the circuit, handing the title to Prost. Pre-race As in , the McLaren team had been dominant throughout 1989. Going into this race, Prost had a 16-point lead in the Drivers' Championship over Senna, 76 to 60. The Brazilian had won six races to the Frenchman's four, including the previous race in Spain, but had only finished in the points on one other occasion, while Prost had only finished out of the points once all season. Therefore, Senna had to win both this race and the final race in Australia to have any chance of retaining his World Drivers' Championship. However, if Senna did win the last two races, he would be champion regardless of where Prost finished, due to the dropped scores system. Qualifying Pre-qualifying report Nicola Larini was fastest in the Friday morning pre-qualifying session for the second Grand Prix in a row, the Osella driver just edging out Philippe Alliot in his Larrousse-Lola. A surprising third place was the Zakspeed of Bernd Schneider, who had not pre-qualified since the first race of the season in Brazil. The car's underpowered Yamaha engine had undergone some testing and development work since the last race, with some clear improvement made. "Our season starts here," Schneider said. The fourth pre-qualifying spot went to Michele Alboreto in the other Lola. Larini's