Fujikura: long-term performance & turning pointsSales (revenue) and profit-margin ratio
Sales (¥ bn)Net margin (%)
1910An independent among the big three
Revenue (¥ bn, bars) · net margin (%, line)
Source: securities reports
1910Cable division split out and incorporated as Fujikura Densen
1923Head office and works move to Kiba, Tokyo
1935Fujikura-type coaxial cable, patented in seven countries
1949Listed on the Tokyo Stock Exchange
Fujikura Densen K.K. was incorporated in March 1910, when the cable division was split out of Fujikura Densen Gomu, a rubber-and-cable partnership trading since 1885. The split followed the money rather than the products: cable grows heavier in plant the more of the chain it takes in — copper smelting, wire drawing, cabling — and the partnership’s ¥200,000 of capital could not fund the next step. The new company started with ¥500,000 and had ¥2 million behind it six years later. For a firm that owned no mine, the joint-stock form was the way to take capital from outside.
The prewar Japanese cable market settled into three houses — Sumitomo, Furukawa and Fujikura — and Fujikura alone stood outside the zaibatsu, competing directly with two rivals who could always out-buy and out-produce it. Its answer, set early, was technology: it absorbed foreign know-how quickly and in 1935 developed its own Fujikura-type coaxial cable, patented in seven countries including the United States, Britain, Germany and France. That principle — an independent survives only by being technically different — outlasted every later change of product.
In 1923 the head office and works moved to Kiba in Koto-ku, Tokyo, still the company’s home; the new Fukagawa site was destroyed by the Great Kanto Earthquake eight months after completion, and production fell back on the old Sendagaya works. Shares were listed on the Tokyo Stock Exchange in May 1949.
1959Copper smelting venture with Mitsui Mining & Smelting
1961First Section, Tokyo Stock Exchange
1965Sakura works (1970: Suzuka)
1970Optical fibre and splicer development begins with NTT’s buildout
1979Optical fibre loss of 0.27 dB/km
Postwar reconstruction gave Fujikura its market: power cable, communications cable and magnet wire, sold into the two largest infrastructure programmes in the country — the transmission grids of the nine regional electric utilities and the telephone network of the public telecommunications corporation, later NTT. Volume plants were laid out from eastern Japan down to the Tokai region: Numazu in 1954, Sakura in 1965, Suzuka in 1970, with an Osaka works for raw materials in 1956 and, from October 1959, a copper-smelting venture at Numazu with Mitsui Mining & Smelting to bring metal supply in-house. The company moved to the First Section of the exchange in 1961.
Fujikura could not match the zaibatsu houses on scale, and it knew it. Through the 1970s, as the telephone corporation began building for optical transmission, all three of the big cable makers entered optical fibre together through joint research — but Fujikura also put a small team on the equipment that no one else was building: the fusion splicer, the device that melts two fibres together in the field. Cable itself would drift toward a contest of volume and price; the tool that joins it would not. In 1979 the company reached a transmission loss of 0.27 dB/km.
That allocation of research money in the 1970s is the origin of what later became the Fujikura brand — optical cable and splicers sold on capability rather than price — and it took forty years to reach full value.
1984Fujikura (Thailand) — wire harnesses for Japanese carmakers
1988DDK (Thailand) connectors; UK operations
1990Head office building at Kiba
1992Renamed Fujikura Ltd.
2001China operations; power-cable venture with Furukawa agreed
From the early 1980s the company built out overseas, following Japanese carmakers into local production: Fujikura (Thailand) in 1984, the connector maker DDK (Thailand) and a British operation in 1988, Hong Kong in 1990, China in 2001. The products were wire harnesses and connectors supplied on the spot, and Thailand grew into the group’s electronics manufacturing hub — the beginning of an automotive components business built on three legs in Europe, North America and Asia.
In October 1992 the name changed from Fujikura Densen K.K. to Fujikura Ltd. The word for “electric wire” came out of the name deliberately: by then the portfolio held optical devices, connectors, wire harnesses, electronic materials and assembly equipment, and the company wanted investors and customers to see a components maker rather than a cable mill. A new head-office building went up on the Fukagawa plant site at Kiba in 1990, and the old plant land was redeveloped as offices in 2003 — a factory district turned into the company’s headquarters and research campus.
2018Automotive products falls to an operating loss
In January 2005 Fujikura transferred its entire power business to Viscas, the fifty-fifty venture with Furukawa Electric agreed in 2001 — handing a business that had been one of its pillars for the sixty years since 1945 to a company run jointly with a competitor. Domestic power cable was in structural oversupply, and ranges overlapped so heavily that no maker could hold prices alone. In the same year a construction and distribution venture, Fujikura Dia Cable, was set up with Mitsubishi Cable. The freed resources went where price competition was weaker: America Fujikura and AFL Telecommunications in the United States in March 2005, and in 2008 a Spanish harness maker bought outright and renamed Fujikura Automotive Europe. Revenue rose from ¥503.0bn in the year to March 2006 to ¥659.4bn to March 2008 before the financial crisis pulled it back to ¥573.6bn.
The redeployment did not fix profitability. The year to March 2012 brought ¥28.1bn of extraordinary losses and a net loss of ¥6.2bn, and in April 2013 the group was reorganised into four in-house companies — energy and telecommunications, electronics, automotive products, real estate — to give each business its own accounts and its own line of responsibility. It lasted eight years. Electronics swung between losses and thin profits, automotive products fell to an operating loss in the year to March 2018, and impairments there steadily ate the money that optical cable and splicers earned.
Ito Masahiko became president in June 2016, and that October a restructuring of Viscas moved distribution and overhead transmission lines back into Fujikura itself. Consolidated operating profit went from ¥34.3bn in the year to March 2018 to ¥27.7bn, then to ¥3.3bn in the year to March 2020. Devolved accountability had not produced a decision about which businesses to keep.
2020Net loss of $360.6M (¥39bn); structural reform begins
2021In-house company system abolished
2022Record profit restored; Okada Naoki becomes president
2024Conductor business split off to Fujikura Dia Cable
2025Record year on AI data-centre demand; 13.8% operating margin
In the year to March 2020 Fujikura took ¥30.7bn of extraordinary losses on ¥672.3bn of revenue and reported a net loss of $360.6M (¥39bn) — the largest in its history, the cost of clearing out unprofitable businesses, automotive above all, that the in-house company structure had left in place for years. A further ¥24.0bn of reform charges produced a second consecutive net loss the following year, but operating profit had already recovered from ¥3.3bn to ¥24.4bn. In April 2021 the company system was abolished and selection and concentration were pulled back to head office.
By the year to March 2022 revenue was ¥670.3bn, operating profit ¥38.2bn and net profit ¥39.1bn — a swing of some ¥80bn in two years on a revenue base no larger than before, because the loss-making end had been cut away rather than grown out of. Okada Naoki succeeded Ito in June 2022 and named overseas optical fibre the next battleground, arguing that penetration of roughly 35% in the United States and Europe left most of the market still to be built.
In April 2024 even the conductor business was split off to Fujikura Dia Cable, concentrating copper wire in a subsidiary and leaving the parent an optical company. The timing was fortunate: demand from generative-AI data centres for high-density optical cable arrived at a company that had spent four years narrowing onto exactly that. The year to March 2025 set records — revenue $6.5B (¥979bn), operating profit $905.4M (¥136bn), a 13.8% operating margin — and the share price rose with them.
The line Matsumoto Tomekichi drew followed not the likeness of the products but the way money had to be raised. Cable is a business whose plant grows heavier the more of the chain it takes in — copper smelting, wire drawing, cabling — and the partnership’s ¥200,000 of capital was not enough for the next investment. That the new company started at ¥500,000 and had built that up to ¥2 million six years later shows the separation was also a procedure for raising capital. For a company that owned no mine, moving into processes that handle copper appears to have required the joint-stock form, which can take capital from outside.
Yet the line can be called correct only because the cable side is what survived. The new Fukagawa site completed in 1923 was wiped out by the earthquake eight months later, and production was carried by the Sendagaya works that had been in use since before the split. The rubber side swelled to eleven plants in wartime and then shrank after it, selling off four — Shinagawa, Numata, Toyama and Fujioka. For each of the two divided businesses a time came when it could not protect itself. What the split produced was not safety but the position of having to raise one’s own capital.
The fusion-splicer research, begun by three people, appears to have been the part of this decision that told most. Optical fibre itself came out of joint research with the telegraph and telephone public corporation, in which Furukawa Electric and Sumitomo Electric took part alongside Fujikura; it was never Fujikura Densen’s alone. But no one owned the device that joins fibres in the field. Cable, like copper wire, is a product that drifts toward a contest of volume and price, and holding the tool that sits outside it left earnings that were not at the mercy of raw-material markets. Reading the inconvenience of splicing as something to sell turned out, in the event, to be right.
The effect of betting on light, however, was long in coming. Forty years passed between reaching 0.27 dB/km in 1979 and ultra-high-count cable taking its place at the centre of the data centre. In the meantime rivals caught up on thin, many-core designs — President Okada remarked in a 2022 interview that others have lately begun doing it too. A policy of leading on technology demands both the stamina not to cut research spending and the patience to wait until demand arrives. The conviction that “there is no way to compete but on technology” points less to the boldness of the choice than to the difficulty of sustaining it.
A fifty-fifty venture was an answer in between withdrawal and continuation. Domestic power cable ranges overlapped from maker to maker, and no company could hold selling prices on its own. Yet folding a business whose grid-maintenance demand still remained would have meant losing the trade with the electric utilities altogether. Setting up a company with Furukawa Electric in 2001 and moving manufacturing, sales and research into it by 2005 looks like a choice to share the economics until it became clear where demand was going. What the freed resources went to — an optical communications base in North America and a wire-harness subsidiary in Europe — shows what was given priority in those years.
But across fifteen years of joint ownership domestic demand did not return. Investment in transmission infrastructure did not grow after the Great East Japan Earthquake, and in 2016 the domestic business was divided by product line: underground and submarine cable to Furukawa, distribution and overhead transmission to Fujikura. The copper wire taken back moved out again in April 2024, conductor business and all, to Fujikura Dia Cable; it did not remain in the parent. A joint venture is a means of buying time, not of creating demand. Where to put part of the founding trade is a question that, twenty years on, is still unsettled.
A cable maker redefined, and the risk in a single concentration
The heart of this decision is that a major cable maker, long dependent on the thin margins of copper wire, first steadied its footing through structural reform and then concentrated its resources on new demand — generative AI and the data centre — remaking itself into a high-margin optical communications company. Without the crisis of the enormous loss in 2020, neither the narrowing onto optical fibre nor the principle of competing on technology as an independent would have been carried this far. The crisis forced selection and concentration, and the AI wave happening to arrive just then turned that concentration into the highest earnings in the company’s history.
High earnings, though, are the reverse side of putting everything into information and telecommunications. The growth in sales and profit leans heavily on optical fibre and optical connection products, so a pause in data-centre investment, rivals racing each other to add capacity, or falling product prices feed straight through to results. Fujikura is investing up to $2.0B (¥300bn) in Japan and the United States to expand capacity, on the view that demand will keep growing. But now that a cable maker close to raw materials has been turned by a demand spike into a high-margin company, the question of how far those margins can hold through the next cycle of demand is still open.
Each heading links to the full Japanese analysis — background, decision and outcome, with sources.
This is a condensed English edition. The full, source-by-source history — with the detailed narrative, financial tables, shareholders and executives — is maintained in Japanese: 日本語版（詳細）— Fujikura full history in Japanese →
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