Company history

Yokogawa was founded by a man who was not an instrument maker at all. Yokogawa Tamisuke was a doctor of engineering and one of the leading architects of his day — the Imperial Theatre, the Mitsukoshi main store, the Tokyo Stock Exchange — who set up the Yokogawa architectural office in 1903 and then kept building businesses around technologies rather than around himself: a bridge works in 1907, and in 1915, in Shibuya in Tokyo, a private laboratory whose purpose was to make precision electrical meters in Japan. At the time such meters came almost entirely from Westinghouse, Siemens and their peers, so the project carried a national weight: the measuring layer under an industrial economy could not be imported forever.

Tamisuke did not run it himself. He handed the development to engineers in their twenties — his nephew Yokogawa Ichiro and Aoki Susumu — and in 1917 they produced Japanese ammeters, voltmeters and wattmeters that the Ministry of Communications and the Navy judged the equal of imports. When the business was incorporated in December 1920 as Yokogawa Electric Works, the founder took no shares and placed Ichiro as the largest holder with about 30%. Ownership and operation were separated on day one, and the result was not a founder’s personal company but a family firm that stayed a specialist maker of instruments — supplying government offices, power utilities and telecom carriers through the rise of Japan’s electrical industry.

The war then made it something else. As an army-designated plant Yokogawa built anti-aircraft fire-control computers and aircraft instruments, and the payroll swelled to some 12,000. Defeat erased that demand overnight. The company closed four of its five plants, consolidated on Musashino, dismissed more than ten thousand people and restarted with about 1,200 — a contraction so violent that everything the company did afterwards was, in effect, a search for demand that did not depend on a single customer.

The answer was to stop selling meters to be read by people and start selling instruments that ran a process. In October 1950 Yokogawa completed Japan’s first electronic-tube self-balancing recorder — an instrument that measured and corrected continuously, without an operator — and with it moved from electrical meters toward industrial instrumentation. The timing was exact: oil refining, chemicals and steel were rebuilding on automation, and the accumulated habit of finishing its own instruments rather than importing them gave Yokogawa something to sell them.

What it did not have, it bought. In 1955 it signed a technical assistance agreement with Foxboro of the United States, the world’s leading maker of refinery control equipment, taking in pneumatic process instrumentation, and a viscometer tie-up with Bendix followed the same year. That imported base is what put Yokogawa inside petrochemical plants. It also began building the frame for what came next — Yokogawa Electric Works, Inc. in the United States in 1957, and a joint venture with Boltron Products, Achrome Electronics, in 1962.

Demand for high-frequency measurement exploded in the 1950s and Yokogawa could not build it, so it decided to import the capability rather than wait to develop it. Yokogawa Shozo argued early that the partner should be the fast-growing Hewlett-Packard rather than the established General Radio; HP’s policy was to license only to wholly owned subsidiaries, and the talks ran eight years, broken open at last through a personal connection — Garner of the Japan Fund, a large Yokogawa shareholder, also sat on HP’s board. Yokogawa Hewlett-Packard was formed in 1963 at 51 to 49 in Yokogawa’s favour. Run on HP methods — strict list pricing, no leaning on either parent — YHP reached ¥46.5bn ($205.1M (¥47bn)) in sales by 1980 at an ordinary margin above 13%. Taking in someone else’s technology and turning it into a main business had been proved to work.

The 1973 oil shock exposed the flaw in the underlying model. Oil-sector customers were 83% of sales, and when the majors and the domestic petrochemical firms cancelled capex together, an instrument business selling discrete devices had nothing to fall back on. The conclusion drawn was structural rather than cyclical: capture the whole plant, continuously, instead of selling boxes into its construction budget. In 1975 Yokogawa announced CENTUM, an integrated distributed control system, and with it declared itself a systems company rather than an instrument maker — a redefinition that took the next quarter-century to complete.

The same period showed the limits of the borrowing strategy. The 1982 CT-scanner venture with GE, Yokogawa Medical Systems, was 49 to 51 — the mirror of the HP deal — and Yokogawa’s stake fell to 25% by 1986 before the business became GE Healthcare Japan and the Yokogawa name disappeared from it. Where Yokogawa led product development it kept control; where it did not, the partner absorbed the venture. Domestically it consolidated instead: the April 1983 merger with Hokushin Electric, third in Japanese industrial instruments, was struck at 1.0 to 0.35 but presented publicly as a merger of equals, with President Yokogawa Shozo deferring to the Hokushin side to the point of drawing complaints from his own staff. Integration finished in three years; the former Hokushin head-office plant was sold to Canon and a thousand people redeployed. In the 1990s President Mikawa Eiji then pushed a restructuring that cut costs by roughly 35% while refusing, on principle, to dismiss anyone.

In 1999 Yokogawa dissolved the 36-year HP joint venture and sold its stake. HP’s own break-up had removed the premise the venture rested on, and Yokogawa took the practical gains — but the effect was that it lost the electronic-instrument business that had been its second pillar, and the one closest to its founding trade. What followed was a decade of narrowing. It tried to buy its way back into measurement, taking Ando Electric from the NEC group for about ¥13.2bn ($105.4M (¥13bn)) in 2002, and then in 2003 closed fifteen plants and opened voluntary redundancy — abandoning the pledge, held since the Hokushin merger of 1983, that it would not cut jobs. A management philosophy that had reconciled rationalization with employment for twenty years gave way to the swings of the oil and gas market.

The narrowing then reached the founding business itself. In 2010 the measuring-instrument operation was moved into a subsidiary, Yokogawa Test & Measurement, leaving the parent a pure control-systems company — the trade the firm had been created for in 1915, set outside the core. In 2015, its centenary year, it cut about ¥40bn ($330.5M (¥40bn)) of fixed costs through 1,105 voluntary retirements and booked ¥16.6bn ($137.2M (¥17bn)) of restructuring charges, deliberately lowering its break-even against oil-price cycles. The following year it paid roughly ¥27.9bn ($256.3M (¥28bn)) for KBC of the UK, adding oil-and-gas plant software and pushing the business from control hardware toward digital solutions.

The 2021 medium-term plan, AG2023, made digital transformation around the control business the priority and set up a regional headquarters in Singapore to pursue Middle Eastern and Southeast Asian plant work; management stated in 2024 that it was the first such plan in which every target was met. A meter laboratory started by an architect had, in a little over a century, become a global supplier of digital control for process plants — having given away, along the way, nearly every business it began with.