The world's largest motor manufacturer is in serious trouble. On April 17, 2026, Nidec (formerly Nihon Densan) received the final report from its third-party investigation committee. The accumulated impact on net profit from accounting fraud reached 161 billion yen (about $1 billion), and impairment losses of up to 250 billion yen ($1.6 billion) are under consideration for the automotive business.

"The person who bears the heaviest responsibility is Nagamori," the report says, naming the 81-year-old founder directly. How did "charismatic founder management," once celebrated as a Japanese success model, become a breeding ground for fraud? After Toshiba, Olympus, and KDDI, another chapter is being added to the long history of Japanese corporate scandals.

What Is Nidec? The World's Top Motor Maker

Nidec, headquartered in Kyoto, is a comprehensive motor manufacturer. Founded by Shigenobu Nagamori in 1973 as "Nihon Densan" (Japan Electric Motor), the company was renamed Nidec in 2023. Its motors spin inside smartphones, laptops, cars, data centers, and home appliances worldwide, and the company holds over 80% global market share in precision motors for hard disk drives.

Consolidated revenue for the fiscal year ending March 2025 reached approximately 2.6 trillion yen ($16.4 billion), with more than 110,000 employees. Through over 60 M&A deals, Nidec expanded aggressively, at one point boasting a market capitalization exceeding 8 trillion yen ($50 billion). Founder Nagamori was celebrated alongside Uniqlo's Tadashi Yanai and SoftBank's Masayoshi Son as one of Japan's "three charismatic entrepreneurs of the Heisei era."

That reputation began to crumble in May 2025, when a cascade of accounting irregularities started surfacing.

The Shock of the Final Report

The final report Nidec received on April 17, 2026 laid out numbers that rank among the largest corporate scandals in Japanese history.

The investigation covered fiscal years 2021 through the first quarter of 2026, with additional retrospective analysis where needed. The accumulated negative impact on net profit reached 161 billion yen (approximately $1 billion). Beyond that, Nidec may need to recognize impairment losses of about 250 billion yen ($1.6 billion) on goodwill and fixed assets in its automotive business.

When you include amounts that were improperly deferred and booked in later periods, the "total scale of accounting fraud" balloons to 449.8 billion yen ($2.8 billion). The deferred items cancel out in cumulative terms, leaving the final impact at 161 billion yen, but the 450 billion yen figure was disclosed to show the sheer scope of the manipulation.

The final report also uncovered new fraud at Nidec Drive Technology, a group company in Mukō City, Kyoto Prefecture: the overstatement of sales figures. This issue remains under continued investigation.

Nidec will have to restate past securities reports, and submission of the fiscal year 2026 annual report is expected to be delayed.

"Red Ink Is a Sin": The Light and Shadow of "Nagamori-ism"

The root cause identified by the third-party committee was excessive performance pressure applied by founder Shigenobu Nagamori. The report bluntly states that "Nagamori must be said to bear the heaviest responsibility" for the accounting fraud.

An interim report on March 3 exposed emails and chat messages Nagamori sent to senior executives. The raw language shocked the business community. When the performance management department submitted draft operating profit targets, Nagamori frequently rejected them. One handwritten rejection in April 2017, responding to a revised plan weighted toward the second half of the year, reportedly read:

"Every single one of you is an irresponsible bastard with no motivation! Cowardly number-crunching makes expectations sink lower and lower. REJECTED. Just quit, all of you! I can't work with people like this!"

Another phrase Nagamori repeated as his management philosophy:

"Red ink is a sin. Missing business targets is evil. Violating rules is a crime."

The irony runs deep. Nagamori frequently used the term ōdō keiri, meaning "righteous accounting," implying clean and proper bookkeeping. But the reality on the ground was: if you can't hit the numbers, "just quit, all of you." That contradiction pushed staff to the edge.

One executive reportedly told a subsidiary head, "You are a Class-S war criminal." Asked at a press conference whether Nagamori's language constituted harassment, current president Mitsuya Kishida acknowledged: "It would not be unreasonable to say so."

The Twisted Logic Behind 2022's "Negative Legacy" Cleanup

The March report also exposed what really happened during the "structural reform" Nidec announced in the fourth quarter of fiscal 2022.

Nidec's CFO proposed that costs associated with clearing "negative legacy" items would not be counted against business divisions' performance evaluations; this, he hoped, would encourage honest reporting from the field. Nagamori approved. As a result, over 160 billion yen in "negative legacy" items were declared.

But at the same time, the CFO was told by Nagamori that full-year fiscal 2022 operating profit must not fall below 100 billion yen, and that fiscal 2023 was expected to show a "V-shaped recovery."

The contradiction was immediate: "Bring out all the negative legacy" versus "Operating profit must not fall below 100 billion yen." To square this circle, only the most urgent items were processed in the current period; the rest were deferred to fiscal 2023 and beyond as "planned processing." The Q4 FY2022 cleanup ended up at only about 56.6 billion yen.

An Auditor Seen as "Easy to Persuade"

The third-party report also raises serious questions about Nidec's relationship with its auditor. According to Nikkei Business, Nidec internally viewed PwC Kyoto (now PwC Japan), its longtime auditor, as "easy to persuade" and "easy to handle."

One striking example: at Nidec Precision, which manufactures camera shutters, a fictitious 580 million yen "technical support fee" was booked in Q2 FY2016. Internal documents contained phrases like "the number of staff [for support] can be whatever works" and "to reach 580 million yen, we need to inflate the headcount here." The outsourcing contract sent to the business partner contained no monetary amount, but an annex showing the 580 million yen figure was submitted separately to PwC Kyoto.

Rating agencies have criticized the third-party committee itself for "insufficient rigor": failing to directly interview PwC Kyoto's partner in charge of Nidec or review audit workpapers.

Nagamori's Quiet Exit at 81

Nagamori's movements since the scandal broke have been described in Japanese media as "a quiet exit."

In December 2025, he resigned as chairman of the board, stepping into a "chairman emeritus" role. Then, on March 3, 2026, the same day the interim third-party committee report was released, Nagamori resigned as chairman emeritus as well, formally stepping away from all management duties. In his farewell comment, he said he wanted "to entrust the entire task of rebuilding to the next generation."

Some close to the company called it "a retreat you can't help but call running away." On March 13, Nidec established an "Executive Responsibility Investigation Committee" composed of external lawyers. The committee will investigate potential legal responsibility of directors, executive officers, and statutory auditors who served between fiscal 2020 and Q1 2026, explicitly including Nagamori and current president Kishida.

Toshiba, Olympus: The Lineage of Japanese Corporate Scandals

Nidec's 161 billion yen impact stands out even among Japan's recent major accounting scandals. A comparison with past cases reveals that Japan has a structural governance problem.

The Olympus scandal (2011) involved hiding investment losses from the bubble era for about 20 years using a technique called tobashi (loss-shifting). The off-book losses totaled around 170 billion yen. British CEO Michael Woodford was dismissed just two weeks after appointment, and his whistleblowing to Western media triggered the exposure.

The Toshiba scandal (2015) involved inflating profits over seven years, with total restatements reaching 224.8 billion yen. The shock was compounded by the fact that Toshiba had adopted an "American-style" committee governance structure, independent directors, audit committee, and all, yet still couldn't prevent the fraud.

The KDDI subsidiary scandal (2026) involved fictitious circular transactions at subsidiary G-Plan continuing for seven and a half years, with fictitious sales accumulating to 246.1 billion yen. Net profit impact reached 129 billion yen (through Q3 FY2025).

And now Nidec, at 161 billion yen, a scandal on par with Toshiba, Olympus, and KDDI in pure scale.

Company Year exposed Method Financial impact
Olympus 2011 Loss hiding via tobashi ~170 billion yen off-book
Toshiba 2015 Profit inflation 224.8 billion yen cumulative
KDDI subsidiary 2026 Fictitious circular transactions 129 billion yen
Nidec 2026 Profit adjustment, cost deferral 161 billion yen + 250 billion yen impairment

The common thread: in every case, excessive performance pressure from top leadership was the trigger. Toshiba had its "challenges", unreasonable profit targets. Olympus had management determined to hide losses from the surface. KDDI had unrealistic expectations for new ventures. And Nidec had Nagamori's credo that "red ink is a sin."

"Security on Special Alert": A Test of Prime Market Listing

In October 2025, the Tokyo Stock Exchange designated Nidec stock as a "Security on Special Alert." This designation is applied to listed companies deemed to have problems in their internal management systems significant enough to warrant improvement, and if improvement isn't recognized, the company risks delisting.

The TSE Prime Market, created in the 2022 market restructuring, is Japan's top tier, positioned as a "quasi-global market" emphasizing constructive dialogue with global investors. Listed companies must meet requirements in market capitalization, liquidity, and governance. A "Security on Special Alert" designation severely damages that credibility.

Nidec plans to revise its "Improvement Plan and Status Report," published in January, after receiving the final report. If successful, the designation could potentially be lifted as early as October 2026, but this hinges on the effectiveness of its recurrence prevention measures.

The Activists Move In: Oasis Makes Its Presence Felt

Hong Kong-based activist investor Oasis Management moved on Nidec stock in March 2026, acquiring 6.74% of shares (total acquisition cost approximately 178.3 billion yen, about $1.12 billion). That single move vaulted Oasis into the ranks of Nidec's top shareholders.

On March 13, Oasis CIO Seth Fischer announced a nominated director candidate and publicly demanded governance reform, calling for "truly independent outside directors."

Nidec plans to announce a director nominee slate in late April following its nomination committee deliberations. Current outside directors are mostly academics and former bureaucrats, but Nidec has indicated it will bring in people with diverse expertise, listed-company management experience, accounting specialists, and so on. However, if current directors remain on the slate, they may also be subject to legal liability findings by the Executive Responsibility Investigation Committee. Nidec faces the difficult task of pursuing accountability and building new leadership simultaneously.

Is Charismatic Management Really Over?

"Is Nagamori-ism obsolete?", Japanese business media have been debating this fiercely.

Not all analysts agree. Economic commentator Takahiro Suzuki argued in President Online that high-pressure management itself isn't unusual, GAFAM companies and Tesla use similar methods. Amazon has its "Day 1" culture; Elon Musk at Tesla is famously demanding. Many growth companies are powered by charismatic founders with intense personal styles.

The real question, then, isn't whether high-pressure management is right or wrong, but why it stopped working in Reiwa-era Japan.

Several factors are plausible. First, shifting worker values. Japanese employee engagement ranks among the lowest globally; "just quit, all of you" doesn't discipline talent, it drives them out the door. Second, strengthened governance requirements at TSE Prime. Shareholder proposal counts hit record highs, and demands for substantive (not just formal) independence of outside directors keep climbing. Third, the growing presence of activist investors. Funds like Oasis and ValueAct are steadily gaining influence as they push for governance improvement.

Nagamori himself had long boasted about his "hands-on management", personally visiting production floors well into his 70s and 80s. But during third-party committee interviews, he acknowledged that in recent years his hands-on approach had broken down. The physical limits of one charismatic figure trying to control a massive, globally sprawling corporate group were catching up with him.

The Next Chapter for Japanese Corporate Governance

The Nidec case surfaces several issues for Japanese corporate governance.

Founder exit design: How and when does a powerful founder like Nagamori hand over authority? It's not just about generational succession, but about standardizing the management culture itself into a transferable form. Japanese companies that successfully moved beyond their founders (Sony, Hitachi, Honda) are once again being studied as reference cases.

Auditor independence: When an auditor is perceived as "easy to persuade," the final line of defense in governance has collapsed.

Substantive outside directors: Activists like Oasis are demanding not just formal placement of outside directors, but genuine supervisory capability backed by management experience and accounting expertise.

The 161 billion yen figure isn't just an accounting matter. It's a milestone signaling a structural turning point for "charismatic management", a success model Japanese manufacturers cultivated for decades to compete globally.

The motors keep spinning. But who manages that rotation, and how, is about to change dramatically.

When a charismatic founder's company faces a governance crisis in your country, how is it usually handled? Which instinct tends to win, protecting the founder, or holding them accountable?

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