The quantum ecosystem in Japan
44 companies, plus the research, capital, and talent around them.
#6 of 47 countries
44
Companies
1
Research institutions
8
Universities
Where the ecosystem clusters
Tokyo 28Osaka 3Wako 2Yokohama 2Atsugi 1Toyota City 1Kyoto 1Okazaki 1
Technology focus
Hardware
26
Software
18
Top companies by Quantum Score
View all 44 →Research & academia
Universities8
Institutions1
Keio UniversityOsaka UniversityUniversity of TokyoTohoku UniversityOsaka Metropolitan UniversityTokyo Institute of Technology
Okinawa Institute of Science and Technology
Top news from Japan

SoftBank’s PayPay Gets Closer to US IPO in Milestone for Japan
Bloomberg · 2/12/2026

Elliott’s $5.5 Billion Japan Shift Faces Test on Toyota Deadline
Bloomberg · 2/11/2026

Top 10 Quantum Computing Companies in Japan
Quantum News · 8/5/2026

Japan mines Pacific Ocean mud for rare earths to counter China’s chokehold
Financial Times Asia · 2/23/2026

Rowan Sees Private Capital as Key Need for Japan
Bloomberg · 2/20/2026

Takaichi, AI, Corporate Reform Pave Way for Japan Stocks in 2026
Financial Post · 12/25/2025
How Japan compares
Company count by country — select any to explore it.






