Japan launches the Fifth Generation Computer Project
MITI bets 54 billion yen on parallel logic-programming machines built for AI
Quick facts
- Sponsor
- Japan Ministry of International Trade and Industry (MITI)
- Managing body
- ICOT
- Duration
- 1982-1992
- Budget
- Approximately 54 billion yen
What happened
Japan's Ministry of International Trade and Industry started the Fifth Generation Computer Project in 1982, establishing the Institute for New Generation Computer Technology (ICOT) to run it. The goal was a new kind of computer built for knowledge-based information processing rather than conventional arithmetic, using massively parallel hardware and the logic-programming language Prolog instead of standard procedural code. ICOT built a series of prototype parallel inference machines, including the PIM/p with 512 processing elements and the PIM/m with 256, aiming for hundreds of millions of logical inferences per second. The project ran for its full planned decade and consumed about 54 billion yen before concluding in 1992 without producing commercially competitive machines, as conventional workstations and the desktop computing revolution overtook its specialized hardware.
Why it matters
The scale of Japan's bet alarmed the US and UK enough to provoke their own major programs, including DARPA's Strategic Computing Initiative and the UK's Alvey Programme, making Fifth Generation the trigger for a second wave of government AI investment worldwide even as the project itself fell short of its goals.
How we know
Japan's own Information Processing Society computer museum documents the project's budget, hardware, and 1992 conclusion; contemporary 1992 press coverage independently confirms the project's acknowledged failure to meet its commercial goals.
Sources
- Information Processing Society of Japan, Computer Museum. Start of the 5th Generation Computer Project for Knowledge-Based Information Processing · General sourcemuseum.ipsj.or.jp · Cited as a "reference" source (no stronger domain match). · Link is live and its text matches the event's key terms (Jul 2026)
- The Baltimore Sun. Japan's computer failure · General sourcebaltimoresun.com · Cited as a "news" source (no stronger domain match).
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