Company history

In May 1951, an ordinance issued under the Allied occupation broke up wartime Japan’s national generation-and-transmission monopoly and the regional distributors, and created nine privately owned utilities — one for each region, each running generation, transmission, distribution and retail as a single business. Kyushu Electric Power was incorporated on 1 May with capital of $2.1M (¥760m), inheriting plants, grid and sales offices outright, and listed in Fukuoka that year and on the Tokyo and Osaka exchanges in 1953.

Nobody founded it, but the design was consequential. Where the industry was cut and where it was bundled decided who would make investment decisions — and Kyushu Electric was handed the demand of seven prefectures as one planning problem. Under regulated tariffs that passed necessary costs plus a fair return through to the customer, projects costing tens or hundreds of billions of yen became financeable; in exchange, customers had no choice of supplier at all.

Postwar Kyushu was a coal-mining and heavy-industry region whose electricity demand climbed steeply, and the company answered it with coal-fired plants clustered on the old coalfields and transmission built out to the steel and chemical works that consumed the power. It set up its own plant-construction subsidiary in 1954 and absorbed two smaller utilities in 1972 and 1973. Regulated revenue funded generation, and the generation created the demand that raised the revenue — a loop that carried the first two decades and left the company heavily exposed to the price of fuel.

The oil shock of October 1973 struck directly at a company whose tariffs carried crude prices straight into cost. Oil still supplied 38% of generation in fiscal 1980, and the exposure showed in both reliability and price. Kyushu Electric set up an emergency management task force in 1976 and an efficiency headquarters in 1977, and drew up a diversification plan to be executed through the 1980s.

The plan is usually remembered as a turn to nuclear power, which understates it. In the same decade the company committed to two reactors, to LNG, to a pumped-storage station with what was then the highest head in the world, to a second geothermal site, and to a 500 kV backbone grid. Split the fuels, split the operating character of the plants, and thicken the grid that carries them — each was a different face of one decision: build a mix that does not bet on the price of oil. Genkai No. 1 (559 MW) entered commercial operation in October 1975 as Kyushu’s first nuclear unit, putting the company among the earliest Japanese operators of pressurized-water reactors.

Through the 1980s the nuclear share went from a few percent to 33% by fiscal 1990, as Genkai 2 (1981), Sendai 1 (1984) and Sendai 2 (1985) came on line, followed by the two 1,180 MW units at Genkai in 1994 and 1997. Alongside them the Tenzan pumped-storage station (1983) balanced peaks so the reactors could run flat out, the Hatchobaru geothermal station tapped a resource peculiar to Kyushu, and the LNG combined-cycle units at Shin-Oita (1991) raised thermal efficiency. Low, stable nuclear fuel costs plus regulated tariffs made this among the steadiest earnings records of the nine utilities.

With six reactors running by 1997, Kyushu Electric was the third-largest nuclear operator in Japan and began looking for revenue beside the regulated core — an international arm in 1999, the regional fibre-optic carrier QTNet as a subsidiary in 2001, overseas independent power investments from 2008. It was never enough to change the shape of the business: of ¥1,486.1 billion in consolidated revenue in fiscal 2010, more than 90% was electricity, and the earnings rested on regional demand and six reactors running well.

In June 2011 it emerged that, ahead of a government-run public meeting on restarting two Genkai units, the company had instructed employees of affiliated firms to send in emails supporting the restart. A whistleblower took the matter to a political party office; an outside investigation traced the instruction to a vice-president. President Manabe Toshio announced at an October press conference that he would stay on. The affair became a symbol of how closed the relationships between the regional monopolies, local governments and local opinion had grown, and hardened public support for restructuring the industry.

By then the reactors were stopping. After the March 2011 earthquake and the Fukushima Daiichi accident, all six units came off line through stress tests and scheduled inspections, and Kyushu Electric ran without nuclear power from 2011 to 2014, burning coal, LNG and oil in their place. Fuel costs rose by roughly ¥240 billion a year; ordinary losses ran ¥213.5 billion, ¥331.2 billion and ¥131.4 billion in the three years to March 2014, with a net loss of ¥332.5 billion in the middle year — the largest since listing — and the equity ratio fell from 26.1% to around 10%. The company raised regulated household tariffs by 6.23% in 2013, cut pay and deferred capital spending, but the path back to profit lay with the regulator, not with management.

On 11 August 2015 Kyushu Electric started up Sendai No. 1 — the first reactor in Japan to restart under the safety standards written after Fukushima, and the first nuclear unit running anywhere in the country in nearly two years. Sendai 2 followed in October, saving roughly ¥150 billion a year in fuel and returning the group to profit after four years, with net income of ¥73.5 billion in the year to March 2016. Genkai 3 and 4 restarted in 2018, but the two oldest units did not: retrofitting reactors built in 1975 and 1981 could not be justified against their remaining life, and both were retired. Six reactors became four.

The territory drawn in 1951 was then dismantled from two directions. Full retail competition arrived in April 2016 and Kyushu Electric began selling power outside its own region. In October 2018 it became the first Japanese utility to curtail output from solar and wind: Kyushu’s flat land and long sunshine hours had drawn in 8.07 GW of solar by that August, close to covering an entire sunny day’s demand on its own. Then on 1 April 2020 the grid itself was separated, transferred to Kyushu Electric Power Transmission and Distribution — ending sixty-nine years of vertical integration and splitting the business in two: a regulated network earning wheeling charges, and a generation-and-retail company exposed to fuel prices and competition.

The split showed its character immediately. The invasion of Ukraine sent LNG and coal prices up in 2022 and, through the lag in the fuel-cost adjustment mechanism, produced a net loss of ¥56.4 billion in the year to March 2023 — yet with four reactors running, Kyushu Electric was one of the few major utilities that did not apply for a regulated tariff increase while seven others did. As prices settled, profit rebounded to record levels: net income of ¥166.4 billion in the year to March 2024 and ¥128.8 billion in 2025. In May 2025 the group published a management vision to 2035 committing about ¥2.5 trillion of strategic investment, roughly ¥1.5 trillion of it to decarbonization — offshore wind, pumped storage, batteries, hydrogen and ammonia, and continued use of nuclear — with renewable sales volume to rise 37% to 37 TWh.