Company history

Kao began in June 1887 as a shop, not a factory. Nagase Tomiro — the son of a sake brewer from Nakatsugawa in Gifu — opened a sundries store in Nihonbashi Bakurocho selling soap and imported stationery. The distinctive thing is that he entered the market from the distribution side rather than manufacture, reading the structure of demand and the market’s judgment of quality through the give-and-take of buying and selling. Japan’s soap market then split into expensive foreign imports and crude domestic goods, leaving a wide gap between price and quality. On the footing of what retail taught him, Nagase in 1890 made his own paulownia-boxed Kao Soap and placed it in that gap — turning from a distributor into a manufacturer. He set up an Osaka agency at launch and, in an age when Tokyo houses sold east and Osaka houses west, used newspaper advertising to treat the whole country as his market from the start. Read demand first, then step into production — that order became a recurring Kao habit.

In 1922 Kao built a mass-production plant at Azuma in Tokyo, sited to serve both water and rail. In 1925 it incorporated as Kao Soap Co., moving from a sole proprietorship to a company, and in 1940 founded Nippon Organic to extend into raw-material chemistry — completing oils and surfactants in-house. The higher-alcohol and oleochemical technology accumulated under wartime military demand became the direct raw-material foothold for later synthetic detergents. By the end of this stretch Kao had assembled the three layers — raw materials, mass production, distribution — under one roof, a stance that worked as a difference against rivals for the next half-century.

In 1951 Kao launched the powdered synthetic detergent Wonderful as electric washing machines spread and bar soap could no longer keep up on lather and dissolving. In 1957 it built a detergent-only plant on the grounds of its Wakayama works for about $2.1M (¥750m), stopping the mixed production of soap and detergent and switching the equipment wholesale to detergent. Because it made its own raw materials, it could move price flexibly against a rival’s hand. This early, irreversible fixing of a business conversion in equipment — while competitors still centred on soap lines — set the base of Kao’s main business and the outline of its competitive rank, and the plant later raised the ceiling on volume as detergent demand surged through the 1960s.

In 1964, led by vice president Maruta Yoshiro, Kao signed resale contracts with roughly 270,000 retailers nationwide, cutting off the primary wholesalers and building its own sales companies (hansha) as the start of the channel. Under the old wholesaler route, shelf prices and inventory movements took time to reach the company, and demand shifts outran any remedy. The wholesalers fought back hard — a “sales-company crushing council” formed in Tokyo — and from 1969 Kao lost the detergent share lead for three years. It accepted the short-term loss of share to hold the route to the shelf in its own hands: a decade-scale bet whose price, friction with the trade, was paid up front.

After the 1973 oil shock the effect showed. With raw-material prices lurching, control of the selling price through wholesaler-free sales companies worked as a device to hold margins even in the downturn, and by the mid-1970s Kao took back the top detergent share. The daily sales data flowing up from the sales companies became direct material for product development and advertising decisions — the origin of Kao’s later reputation for data analysis lies in this distribution reform. A ten-year bet, its friction shouldered in advance, was recovered as regained leadership and preserved margins, and the same hand Kao had shown by investing ahead of rivals in equipment and raw materials now took the same form in distribution.

In 1978 President Maruta decided a three-year capital plan of some $597M (¥120bn) to $646.8M (¥130bn): after distribution comes technology. Having secured demand through the sales companies, he moved to fix, in three years, the manufacturing capacity and raw-material sourcing to meet it — a new Kashima plant, palm-oil procurement bases — strengthening vertical integration from upstream to downstream as one. In 1986 Kao began Total Cost Reduction across the whole company, reworking how cost piled up in raw materials, manufacturing and logistics alike. Reinforcing, from the production and procurement side, the information base built by the sales-company reform, this period tended distribution, technology and cost in three layers at once.

The completed vertical integration produced differences from rivals in both the speed of ramping new products to volume and the stability of raw-material supply. A mechanism that read demand off the daily sales data and reflected it straight into production plans linked shelf movement and factory operation on a short cycle. On that footing Kao carried the base into new categories — cosmetics in 1982, the Merries disposable diaper in 1983 — and in 1985 renamed itself Kao Corporation. Gathering R&D, mass production, sales and price-setting into a single flow became the base of the high-earning constitution of later years.

The same self-reliant, irreversible instinct also produced a costly detour. In 1985 Kao entered the floppy-disk business as a cross-industry application of its surfactant know-how — coating magnetic material evenly onto a substrate suited its interface-control skills — and sales reached a peak of about $850.6M (¥80bn). But as recording-media unit prices kept sliding, Kao withdrew completely in 1998, President Goto making the locus of management responsibility explicit through demotions and bonus cuts. That the technology connects does not guarantee the business can continue: fixing a business conversion in equipment (1957, Wakayama) and fixing a retreat in personnel (1998) are of one lineage — a one-way ticket in either direction.

In 1999 Kao introduced EVA management, unifying its yardstick around profit measured after the cost of capital — shifting from chasing sales scale toward reallocating capital from businesses that cannot cover their capital cost to those that can. The same year it set up Kao Sales (Kao Hanbai), bringing the 40-year distribution reform begun with the 1964 resale contracts to a provisional completion as an integrated production-and-sales system. Raw materials, manufacturing, distribution and metric now ran the company’s judgment on one thread.

In 2006 Kao acquired Kanebo Cosmetics for about $3.5B (¥410bn), adding cosmetics to household goods and chemicals for a three-business structure — connecting the sales base built in household goods and the interface and oleochemical base built in chemicals to the higher-value ground of cosmetics. But integration did not move at the envisioned speed: brand cleanup and unifying the sales organisation took time, and payback slid back. A company skilled at fast, irreversible moves in equipment and in exit could not reproduce that speed in the post-acquisition integration of a different culture. Overseas, Merries shifted from export to local production in China from 2011 — quality leadership at home did not translate abroad by itself, the same lesson as Kanebo reappearing in the overseas business.

By the late 2010s EVA’s tilt toward short-term results fit poorly with the long horizons of overseas expansion and R&D, and Kao reworked its metric system from EVA to ROIC toward 2030 targets, turning its overseas method toward buying established local brands (Bondi Sands in Australia, 2023) rather than exporting Japanese products. President Hasebe Yoshihiro, who took the top job in 2021, refreshed the mid-term plan from K25 to K27 in 2024 and drove a restructuring that took $361.1M (¥55bn) in one-time costs, divesting low-capital-efficiency businesses — the toilet line, then pet care and beverages. In 2025 Kao rejected a shareholder proposal from the Hong Kong fund Oasis Management; the gap between Kao’s ESG long horizon and the fund’s demand for faster capital efficiency remained. Kao’s ROIC, recovered to 9.2%, now aims above 11% — and how to split capital between long-horizon ESG bets and the capital market’s near-term demands is the next test of the yardstick it swapped in.