Japan’s Largest Quantum Startup OptQC Secures ¥1.5 Billion, Revealing Vast Funding Gap with U.S. and Raising ‘Elpida-Style Failure Risk’ Concerns

note Japan

Overview

OptQC, Japan’s largest quantum startup, raised ¥1.5 billion (approximately $10 million), highlighting a significant funding disparity compared to U.S. counterparts like PsiQuantum’s $1 billion in 2025. This funding gap raises concerns about an ‘Elpida-style failure risk’ where Japanese quantum hardware development outpaces ecosystem and talent development, leading to potential stagnation due to capital scarcity. The article discusses leveraging policy support, such as SBIR programs, to help startups overcome this ‘Death Valley’ of funding.

In Depth

Key Findings

OptQC, recognized as Japan’s largest quantum startup, recently secured ¥1.5 billion (approximately $10 million) in funding. However, this figure starkly contrasts with the $1 billion raised by U.S.-based PsiQuantum in 2025, revealing a massive international funding gap. This disparity highlights a critical concern for Japanese quantum startups: the ‘Elpida-style failure risk,’ where advanced hardware development outpaces the growth of a supportive ecosystem and talent pool, potentially leading to stagnation due to insufficient capital.

Technical / Industry Context

• Funding Discrepancy: Annual venture capital (VC) investment in Japanese quantum startups is significantly lower—multiple times less—than in their U.S. counterparts. This makes it particularly challenging to secure the colossal investments required for hardware development, which is capital-intensive in quantum computing.
• The ‘Elpida-style Failure Risk’: This term refers to the historical case of Elpida Memory, a Japanese DRAM manufacturer that, despite having superior technology, succumbed to bankruptcy due to its inability to compete in the global funding race. The concern is that highly promising Japanese quantum startups could face a similar fate, failing to commercialize due to a lack of sustained financial backing.
• Ecosystem and Talent Development Challenges: The funding deficit affects not only hardware development but also software, algorithm, and application development, as well as the cultivation of skilled personnel. A robust quantum ecosystem requires balanced growth across hardware, software, services, talent, and funding.

Background & Policy Discussion

The Japanese government has designated quantum technology as a strategic growth sector, increasing public funding for R&D. However, large-scale private sector investment remains limited. The article advocates for policy interventions similar to the U.S. Small Business Innovation Research (SBIR) program, which provides government contracts and grants to small businesses for R&D with commercial potential. Such initiatives are crucial for facilitating early-stage investments and helping startups navigate the “Death Valley” of funding, bridging the gap between innovative research and commercial viability.

Strategic Significance & Outlook

For Japan’s quantum computing sector to maintain international competitiveness and ultimately commercialize practical quantum computers, a concerted effort involving substantial funding from both government and private sectors is indispensable. Strengthening support mechanisms, particularly to help startups cross the “death valley” of growth, is critical. Policy-wise, implementing SBIR-like programs and creating an environment conducive for venture capitalists to invest in quantum technologies are urgent priorities. This strategic approach is expected to enable Japanese quantum technology to establish a significant presence in the global market, avoid past pitfalls like Elpida, and achieve sustainable growth.