GoKawiilRapidus is bidding Japan's entire return to leading-edge logic on one fab in Chitose, Hokkaido, and the schedule now turns on a 2027 mass-production target for a 2nm process that no high-volume customer has yet committed to.
Since opening the IIM-1 pilot line in April last year, the company has run wafers through Japan's first mass-production-grade EUV scanner, produced a 2nm gate-all-around prototype that reached its expected electrical characteristics in July, and closed a ¥267.6 billion funding round in February that made the Japanese government its largest shareholder. CEO Atsuyoshi Koike said the same month that more than 60 companies are in talks over 2nm capacity, but not one has yet signed a volume agreement. Given that its entire production base is the single IIM-1 facility, this leaves Rapidus with no diversification and no fallback site if the node doesn’t go ahead as planned.
However, the fab has the hopes of an entire nation pinned on it, and its plans are promising. Here's the breakdown.
A ticking clock on IIM-1
(Image credit: Rapidus)
IIM-1, short for Innovative Integration for Manufacturing, broke ground in September 2023 at Bibi in Chitose, with the cleanroom completed in 2024. ASML delivered a TWINSCAN NXE:3800E in December 2024, the first mass-production-grade EUV system installed in Japan, and the tool completed its first exposure on April 1st last year. The pilot line also began operating that month.
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Rapidus is currently targeting 2027 for mass production, but the company has given that date without any further qualification, with its business plan simply pointing to production beginning in the second half of fiscal 2027 and scaling to full volume in 2028. The same plan sets out a capacity ramp from roughly 6,000 wafer starts per month at the outset to around 25,000 within the first year, a fourfold increase that Rapidus is counting on to bring per-wafer costs down.
IIM-1’s siting in Chitose offers the abundant water that wafer cleaning demands, a cool climate that eases cooling loads, and some of Japan's strongest renewable-energy potential across wind, solar, and hydro. Local and prefectural authorities have organized around the project under a “Hokkaido Valley” initiative that aims to build a semiconductor cluster spanning Tomakomai, Chitose, and Ishikari.
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