Fujitsu Limited (富士通株式会社; commonly "Fujitsu") is a Japanese multinational information and communications technology (ICT) company founded June 20, 1935. Its headquarters are in Nakahara-ku, Kawasaki, Kanagawa, Japan, following a 2024 move from Tokyo. It is publicly listed on the Tokyo and Nagoya stock exchanges (TSE: 6702; ADR: FJTSY) and is a Nikkei 225 constituent. Fujitsu reports roughly 99,000–124,000 employees depending on the source and reporting year (consolidated headcount was 112,743 as of March 31, 2025), with revenue in the ¥3.5–3.76 trillion range and total assets of about ¥3.5 trillion.
Fujitsu is an operating company. It organizes its business into Service Solutions (consulting, cloud IaaS/PaaS/SaaS, systems integration, business applications and middleware, business process outsourcing, data-center/network/security/managed IT services, and the "Uvance" solutions portfolio); Hardware Solutions (UNIX, x86 and mission-critical servers, mainframes, storage systems, and network products including optical transmission systems and mobile base stations); PCs; and device/electronic-component offerings. It also develops high-performance computing platforms (the RIKEN "Fugaku" supercomputer, PRIMEHPC) and quantum-inspired ("Digital Annealer") and quantum computing technology.
Litigation posture: the tracked data shows Fujitsu as a defendant in 1 case and plaintiff in 0 — the profile of an operating company being targeted, not an asserter. The sole tracked suit was filed in the plaintiff-friendly Eastern District of Texas (Marshall) before Judge T. John Ward.
Notable case: Technology Properties Ltd. et al. v. Fujitsu Limited (filed Oct. 24, 2005, E.D. Tex., No. 2:05-cv-00494). Plaintiff Technology Properties Limited, working with Patriot Scientific Corporation, asserted the jointly owned "MMP" microprocessor portfolio (U.S. Patents 5,784,584, 5,809,336, 6,598,148) against Fujitsu and roughly 20 other Japanese electronics makers. Fujitsu and co-defendants filed parallel declaratory-judgment actions in the N.D. Cal. The patents were later held not infringed as to ARM's cores, and the '584 claim was invalidated in reexamination — consistent with TPL/Patriot's characterization as an acquired-patent licensing and assertion enterprise.