Dr. Seiuemon Inaba
Co-founder 1972Background
Dr. Seiuemon Inaba was a pioneering electrical engineer and industrial automation visionary who recognized that post-war Japanese manufacturing was fundamentally crippled by manual machining processes and inconsistent quality control. His defining founding moment was the 1955 establishment of a small numerical control (NC) laboratory within Fujitsu, which eventually secured critical defense contracts to build Japan's first fully electronic NC unit for milling machines.
Role at Fanuc Corporation
Dr. Seiuemon Inaba founded Fanuc Corporation in 1972 following the spin-off of Fujitsu's numerical control division, bringing a deep understanding of precision machining, semiconductor fabrication, and servo motor design to the chaotic industrial automation sector. Under his leadership, the company executed a massive, highly controversial vertical integration strategy, halting all external component sourcing and building specialized manufacturing facilities for precision ball screws, spindle drives, control ICs, and robotic manipulator arms. Inaba's leadership style was defined by extreme technical rigor, an uncompromising commitment to zero-defect manufacturing, and an absolute refusal to externalize component production. In 1982, he led Fanuc to full independence from Fujitsu, raising massive amounts of capital to expand the Mount Fuji manufacturing campus and execute a relentless, debt-free expansion into global industrial robotics markets. When the global manufacturing sector experienced severe cyclical downturns in the late 1990s and early 2000s, Inaba executed a ruthless strategy of capital discipline, maintaining R&D budgets, expanding proprietary software development, and acquiring advanced semiconductor fabrication equipment to secure Fanuc's technological independence. Inaba stepped down as president in 2015, but his legacy is a company that fundamentally altered the physical infrastructure of the global industrial automation sector, providing the massive, highly reliable control architectures that form the foundation of Fanuc's current market dominance.