The Fifth Generation Computer Systems project was a Japanese national research initiative announced at an international conference in Tokyo in October 1981 and formally launched in 1982 by the Ministry of International Trade and Industry (MITI). This entry dates the launch to 1982. The work was carried out by a dedicated organization, the Institute for New Generation Computer Technology (ICOT), whose final conference proceedings are archived at the Internet Archive; the IPSJ Computer Museum provides a first-party institutional summary.
The goal was to leapfrog past conventional computers, the “fourth generation,” to a new kind of machine built for knowledge information processing, in other words, machines designed to reason rather than just calculate. The plan centered on logic programming, particularly the Prolog language, running on custom parallel inference hardware that could perform many logical deductions at once. According to the IPSJ Computer Museum, roughly 54 billion yen was invested over about a decade, ending in 1992.
The project drew worldwide attention and alarm. Governments in the United States and Europe worried that Japan might seize the lead in advanced computing and responded with their own funding programs. In the end the project produced real parallel inference machines and a large body of logic-programming research, but it did not deliver the broad commercial breakthrough it had promised, and the wider world had shifted toward standard hardware and, eventually, statistical approaches to AI.
Why business readers should care: the Fifth Generation project is a cautionary tale about betting a national strategy on one technical vision. It bet heavily on symbolic, logic-based AI just as that paradigm was approaching its limits, a reminder that even well-funded, well-coordinated programs can back the wrong approach.