Company history

Chubu Electric Power was created in May 1951 by administrative order. The wartime power structure was broken up under the Electricity Utility Reorganization Order, and the new company took over the assets of Chubu Haiden (the regional distributor) and Nippon Hassoden (the national generator) across five prefectures — Aichi, Gifu, Mie, Shizuoka and Nagano. It listed in Tokyo, Nagoya and Osaka the same August. Within the nine-utility system that governed Japanese electricity for the next half-century, it ranked third in scale behind Tokyo Electric Power and Kansai Electric Power.

Its territory had no metropolis on the scale of Tokyo or Osaka, but it had factories. Toyota Motor and the wider Chubu industrial belt — automobiles, machinery, ceramics — made industrial demand the company's core revenue, and that demand moved with the production line: strong growth in booms, visible contraction in downturns. Through the high-growth decades Chubu Electric built out generation and grid in step with that industry, and the industry's cycle became the company's cycle.

The regulatory bargain shaped everything else. A monopoly franchise plus total-cost ratemaking — recover costs and a fixed return on top — meant the company could earn reliably without ever leaving electricity. It was a system that removed the reason to look outside, and for more than fifty years Chubu Electric did not: the electricity segment would go on accounting for roughly 95% of consolidated revenue.

In March 1976, Unit 1 of the Hamaoka Nuclear Power Station entered commercial operation; five reactors were eventually built there. Hamaoka differed from every other Japanese nuclear station in one respect that no amount of engineering could remove: it sits directly above the assumed source region of the anticipated Tokai earthquake, where seismologists put the odds of a magnitude-8 event within thirty years at high. Some argued it should never have been built there at all. Its proximity to the Tokaido Shinkansen and the Tomei Expressway — the country's main arteries — sharpened that judgement, among specialists and residents alike.

The company answered with continuous seismic reinforcement, and in January 2005 decided to retire the ageing Units 1 and 2 rather than keep upgrading them. Units 3 to 5 kept running, and nuclear supplied roughly 15% of the generation mix. The exposure was already visible in the numbers: the year ended March 2009 produced a net loss of $182.9M (¥19bn), driven by fuel costs from a prolonged Hamaoka outage on top of the global financial crisis. Owning this particular plant put a risk on Chubu Electric's balance sheet that no peer carried.

Everything around it, meanwhile, looked placid. Through the 2000s consolidated revenue ran between $19.1B (¥2.1tn) and $22.7B (¥2.5tn) with ordinary profit of $1.1B (¥120bn) to $2.0B (¥220bn), the dividend sat unchanged at ¥60 a share, and the stock was a standard defensive holding. C-Energy was set up in 2001 to enter distributed energy, and non-utility segments began appearing in the accounts from 2006, but none of it moved the mix: electricity stayed above 90%. A company whose profits turned on whether one seismically exposed plant was running had made almost no progress at diversifying its sources of revenue — and liberalization of the power market was, by then, already under way.

Two months after the Fukushima Daiichi accident, Prime Minister Naoto Kan asked Chubu Electric to shut down all of Hamaoka, citing the Tokai earthquake. The request carried no legal force; the company accepted it on 9 May 2011 and stopped the running Units 4 and 5, with Unit 3 already in outage. Replacement thermal generation was estimated to add about $3.1B (¥250bn) a year in fuel costs, and the $1.6B (¥130bn) operating profit forecast published in April was withdrawn at once. A business earning from electricity alone had no cushion for an indefinite nuclear shutdown.

The year ended March 2012 brought an ordinary loss of $849.8M (¥68bn) and a net loss of $1.2B (¥92bn); losses continued for three straight years, and the equity ratio fell from 27.3% to 20.1%. Unlike Tokyo Electric, Chubu Electric avoided effective nationalization — but Hamaoka has still not restarted as of 2026, leaving the company running without nuclear power for more than fifteen years. Management concluded that the problem was not the outage but the shape of the business, and moved on the thermal fleet itself.

In April 2015 Chubu Electric and Tokyo Electric established JERA as a 50-50 venture, meant to integrate the whole chain from fuel upstream and procurement through generation to wholesale — an unprecedented combination of two domestic utilities' thermal businesses, aimed at buying LNG with international bargaining power rather than through trading houses. The transfer came in stages: fuel transport and trading in October 2015, existing fuel and overseas generation in July 2016, and in April 2019 the entire domestic thermal fleet. Chubu Electric became a utility that owns no power stations of its own, while JERA grew into one of the world's largest generators at roughly 67 GW.

The rest of the restructuring followed the law. Alongside the thermal transfer, preparatory companies for Chubu Electric Power Grid (transmission and distribution) and Chubu Electric Power Miraiz (retail) were set up in April 2019 ahead of the legal unbundling of April 2020, leaving the parent as a holding company handling group management, Hamaoka and new businesses. Revenue held up — $27.5B (¥3.04tn) with ordinary profit of $1.0B (¥113bn) in the year ended March 2019 — but the profit now arrived in three separate streams: equity earnings from JERA, regulated returns at Power Grid, and retail margin at Miraiz.

The holding structure took effect in April 2020, and Kingo Hayashi became president the same month. In an interview that year he said plainly that electricity was one business among many, and set out a conversion from a power utility into a comprehensive infrastructure and services company — an unusual line in this industry, and the conclusion management had reached after a decade of trial and error since Hamaoka stopped. In April 2021 the company backed it with an act no Japanese utility had attempted: a $186.7M (¥21bn) third-party allotment that lifted its stake in the property developer Nippon Escon from about 30% to 51.5%. The management vision targets a 1:1 split by fiscal 2030 between domestic energy and the combination of new-growth and overseas businesses; a real-estate division was created in April 2025 to gather the scattered property units, and Genex was acquired in January 2024 to expand renewables.

The weakness of owning no generation showed almost immediately. In the year ended March 2022 a global fuel-price spike hit Miraiz's retail book for a loss of $759.7M (¥83bn), dragging the group to an ordinary loss of $540.2M (¥59bn) and a net loss of $391.7M (¥43bn) — the first red ink since the post-Hamaoka years. With its own reactors idle and its thermal plants inside JERA, the company must buy power from JERA and the wholesale market, with limited means of hedging a fuel spike. Ordinary profit recovered the following year, but that procurement-cost risk is a structural feature now, not an episode.

The size of the swing was on display again in the year ended March 2024: ordinary profit of $3.6B (¥509bn) and net profit of $2.9B (¥403bn), flattered by stable fuel prices and the timing lag in the fuel-cost adjustment mechanism. Management itself put Miraiz's ordinary profit excluding that lag at about $1.4B (¥191bn), with a cruising level of $284.7M (¥40bn) to $355.8M (¥50bn). Separating a one-off result from durable earning power is the essential discipline in reading this company.

Hamaoka, meanwhile, remains unresolved. The Nuclear Regulation Authority has found the design-basis ground motion "broadly appropriate" and the tsunami review is in its final stage, but the plant review proper has not begun and no completion date is visible, while spending on the seawall and other safety work keeps accumulating into the thousands of billions. A restart would matter — a single reactor saves fuel costs in the tens of billions of yen and would improve Miraiz's procurement economics — but the same uncertainty makes capital policy hard: with the equity ratio at 39.1% in the year ended March 2025, at the top of the company's optimal range, buybacks and dividend increases wait on a roadmap that does not yet exist.