Company history

Ebara begins with a paper rather than a product. In 1905 Inokuchi Ariya, a professor at Tokyo Imperial University, published the world’s first theory of the volute pump. A shop called Kunitomo Iron Works was founded to turn it into machinery and built prototypes to his designs — and then ran out of money and closed in the last years of Meiji. The physics had been right; the commercialization had failed anyway. Hatakeyama Issei, who had studied under Inokuchi on that shop floor, drew the obvious conclusion.

When he set up the Inokuchi-shiki Kikai Jimusho at Nippori in Tokyo in 1912, he kept design, manufacture and sales together in one house instead of farming any part of it out — a deliberate correction of what had killed Kunitomo, and the origin of a house style in which fluid engineering and precision machining are carried end to end. Japan’s pump market was then largely imported, with Mitsubishi Heavy Industries and Hitachi the only domestic rivals worth the name. Hatakeyama entered Tokyo City’s pump performance trials and won on the consistency that integrated production allowed; domestic machines began pushing the imports out.

In 1919 the firm delivered fifteen volute pumps to the Tawaramachi pumping station and the Mikawashima sewage works — record-sized machines for their day, and the order that settled both its engineering reputation and its finances. In 1920 it moved its works to Shinagawa in Ebara district and incorporated as Ebara Manufacturing with capital of ¥3 million, taking its name from the place it had moved to. By the early Showa years it held better than 60% of Japanese pump output, standing with Hitachi and Mitsubishi at the top of the domestic trade, and carrying a founding motto — “heat and sincerity” (熱と誠) — into its training of engineers. The Haneda works opened in 1938 as head office and main plant; Kawasaki followed in 1941; and in 1945 war damage forced production out of Haneda and into Kawasaki overnight.

In May 1949 Ebara listed on the first sections of the Tokyo and Osaka exchanges, joining the postwar capital market with its main plant still half-repaired; production returned to Haneda in full in 1955. What followed was less a recovery than a widening. In 1956 it set up Ebara Infilco to make and sell water-treatment plant — the start of a line that would run through the 1994 absorption of that subsidiary and on to the founding of Swing in 2009, and the point at which a pump maker began selling systems rather than machines.

Two more legs arrived together in 1964: the first postwar overseas office, in Bangkok, and Ebara Service, which organized after-sales work into a business of its own — a natural fit for equipment that runs for decades and is maintained on site. In 1965 the new Fujisawa plant put standard pumps into volume production for the first time in Japan, giving Ebara a catalogue product to sell in quantity alongside its engineered-to-order machines; a Sapporo listing followed in 1968. By the end of the period the three seeds — pumps, water, service — were all in the ground.

Overseas manufacturing began in 1975 with Ebara Industrias Mecanicas in Brazil, and the same November the Sodegaura plant started building compressors and turbines, turning rotating machinery into a business in its own right. Indonesia followed in 1979, the United States in 1981, Italy in 1989 (stainless pressed standard pumps), China in 1992. The logic was unusual for a commodity product: rather than compete on price alone, Ebara laid down sales and service networks country by country and sold responsiveness with the pump.

Under Fujimura Hiroyuki, president from 1986, the portfolio was rearranged around that reach. Ebara Infilco was absorbed into the parent in October 1994, pulling water treatment back in-house. In April 2000 Ebara bought the American Elliott Company outright — a world-scale maker of compressors and turbines, and the acquisition that made Ebara a global rotating-machinery firm. A quarter of a century later Elliott is the core of the Energy company and of Ebara’s hydrogen and decarbonization orders; in 2002 the business was separated as Ebara Elliott so that its returns could be managed on their own.

The business that would eventually carry the company was seeded almost in passing. In July 1987 Ebara built a precision machinery plant inside the Fujisawa works and began making vacuum equipment for the semiconductor industry — an application of pump technology, taken up in the middle of the bubble-era investment boom. Gases are not liquids, but handling fluid with precision is the same discipline. Then a customer suggested that a supplier of trusted vacuum pumps might as well try the production equipment too, and in 1992 Ebara reached for CMP tools, which planarize semiconductor wafers. Volume production did not start until Ebara Kyushu opened in Kumamoto in June 2001 — fourteen years after entry. In the company’s own plans of the time, semiconductors ranked behind the environment business.

The environment business, the one ranked first, broke. Tightened dioxin rules from 2002 sent municipalities rushing to replace incinerators, and Ebara won a large number of orders for gasification-melting furnaces — a plant type working on a different principle from the incinerators it replaced. Rework and slipped schedules followed, engineering margins collapsed within months, and in the year to March 2003 Ebara fell to a net loss of $245.9M (¥29bn), the heaviest single-year loss in its postwar history. In April 2005 it reorganized into three product-based companies — fluid machinery, environment, and precision & electronics — the framework under which semiconductors were still only the third business.

Then came a failure of a different kind. In 2007 a vice-president was found to have embezzled from the company; the president resigned over it and Yago Natsunosuke took the office. In September of the same year Ebara decided to close the Haneda works after sixty-nine years. The site went to Yamato Transport, which planned a distribution centre there, for about $717.5M (¥85bn), and Ebara booked an extraordinary gain of $614.8M (¥72bn) in the year to March 2008 — land bought before the war, converted into cash at a stroke, and enough to paper over the 2003 loss. Manufacturing moved to Sodegaura and, from 2010, to a new plant at Futtsu.

The sale left a bill. In January 2011 asbestos contamination was found on the Haneda site; complete removal delayed Yamato’s construction, and Ebara was sued for ¥8.5bn. It lost at the Tokyo District Court in April 2016, at the High Court in June 2018 and at the Supreme Court in January 2019, paying ¥5.9bn plus interest, after taking a ¥6.4bn provision in the year to March 2016. Meanwhile the environment business was rebuilt away from contracting risk: waste treatment was consolidated into Ebara Environmental Plant in October 2009, and the water business became Swing, held equally with Mitsubishi Corporation and JGC from March 2010 — a move from building plants to running them. Maeda Toichi became president in 2013, and in June 2015 Ebara adopted a nominating-committee board structure, eight years after the embezzlement and closing the account on both stumbles.

The seed of 1987 grew into the earner. In January 2023 Ebara abandoned the product-based structure — fluid machinery, environment, precision & electronics — for five companies defined by the markets they face: Building & Industry, Energy, Infrastructure, Environment, and Precision & Electronics. Organizing by type of machine had left several companies calling separately on the same customer; organizing by market let Ebara start from the customer’s problem and sell across a range that now runs from standard pumps to semiconductor tools.

The medium-term plan E-Plan 2025 then sorted the five into growth businesses (Precision & Electronics, Building & Industry) and foundation businesses (Environment, Infrastructure) — a change in how capital is handed out rather than in what is owned, since nothing was sold. Led by semiconductors, the year to December 2024 produced a record operating profit of $646.9M (¥98bn), and Hosoda Shugo, president since March 2025, has pledged revenue of $6.7B (¥1tn). The concentration is also the exposure: semiconductor demand moves in waves, and the businesses parked among the foundations are the successors of the ones that lost $245.9M (¥29bn) in 2003.