In 1992, Kazunori Yamauchi worked at Sony Music Entertainment. He was not an engineer. He had not studied computer science. He was a producer in a music company, twenty-five years old, and he had just written his hundredth proposal for a video game. This one was about cars.
The concept was simple: a racing game built on realism, not cartoon handling or shortcuts. It was one of nearly a hundred proposals Yamauchi had drafted that year. Most went nowhere. This one got a response. Sony was preparing to enter the console business, and they were looking for ideas that could define what a new machine might do. The proposal moved forward. Yamauchi did not know how to drive when he wrote it.
In 1994, he transferred from Sony Music Entertainment to Sony Computer Entertainment. His first project was a lighthearted kart racer called Motor Toon Grand Prix, released later that year. It gave him room to learn the platform. The real work began immediately after. Gran Turismo started with a team of five, including Yamauchi, in the second half of 1992. At no point over the next five years did the team grow beyond fifteen to twenty people.
The process was slow because the work was meticulous. Hundreds of cars modeled from manufacturer specifications. Tracks surveyed from real-world courses. A physics engine built not from guesswork but from studying how suspension, weight transfer, and tire grip actually behaved. Yamauchi served as director, producer, and for long stretches, designer and programmer. He learned to drive — in part by designing the driving model itself, testing each variable against the feeling he was trying to reach.
The hours were relentless. When asked years later how difficult it was to create the first Gran Turismo, his answer was brief: 'It took five years.' In another interview, he estimated he was home only four days a year during development. The budget was approximately five million dollars, modest even by mid-1990s standards. The team had to build everything themselves: no shortcuts, no licensed engines, no pre-built assets. What they lacked in resources, they compensated for in precision.
Gran Turismo was released in Japan on December 23, 1997, for the original PlayStation. It sold over ten million copies worldwide and became the best-selling game on the platform. Critics and players responded to something they had not encountered before — a console racing game that did not feel like an approximation of driving but a patient, obsessive attempt to reproduce it. The franchise has since sold over one hundred million units across all entries, establishing Yamauchi's vision as one of the most commercially successful in racing game history.
On April 2, 1998, following the success of Gran Turismo, Yamauchi founded Polyphony Digital as a fully owned subsidiary of Sony Computer Entertainment. He has served as its president ever since. Under his leadership, the studio has grown from a team of fewer than twenty to over two hundred employees. He is also an accomplished racing driver, having competed regularly in events including the 24 Hours of Nürburgring.
Yamauchi has said in interviews that he wants Gran Turismo to be a game people do not feel was a waste of their lives. He built the tools he needed because they did not exist. He learned the craft he needed because he did not know it. The light he was following was quiet, but it did not go out.