Nidec Plunges 17% in a Single Day Amid Reports of Over ¥1 Trillion Impairment Charge
nashnova research
Nidec's stock plunged 17% on the 28th after reports the company plans to book roughly ¥1 trillion ($6.3 billion) in retroactive impairment charges; the board has simultaneously voted to remove the sitting CEO, triggering a twin management-and-financial crisis.
What happened?
Japanese magazine *Diamond Weekly* reported that Nidec plans to retroactively book about ¥1 trillion in impairment charges tied to accounting problems, covering the fiscal year ending March 2026.
The report did not name its sources; a Nidec spokesperson could not immediately comment outside Bloomberg's business hours.
This means → the news is unconfirmed by the company, yet the market has already rendered its verdict with a 17% single-day drop.
Where did the accounting problems come from?
Nidec disclosed accounting irregularities last year involving subsidiaries in Italy, Switzerland, and China, as well as its automotive inverter business.
Earlier this year the scandal forced out the company's founder and former CEO, Shigenobu Nagamori.
In plain terms = the books at multiple overseas units were wrong — on a scale large enough to unseat the founder — and the bill is now coming due.
The CEO was also removed?
*Diamond Weekly* also reported that Nidec's board voted last week to dismiss current CEO Mitsuya Kishida.
The company plans to announce new leadership as early as Tuesday.
This means → the write-down and the leadership change are moving in lockstep — the board is trying to sever all ties to the old management's legacy in one stroke.
What does this mean for Nidec?
If the ¥1 trillion-plus impairment is finalized, it would deal a major blow to Nidec's financial position.
Nagamori's hard-driving management style is widely seen as having fostered a corporate culture that allowed fraud to flourish at scale.
This reflects a problem that goes beyond a few bad entries — it is a systemic governance failure; whether the new leadership can rebuild market trust in the near term remains the central uncertainty.
市场有风险，内容仅供研究参考，不构成投资建议。