ニデック、監査法人が意見不表明？上場維持できるか？
NISA investors can lose up to 20.315% of their dividends to tax simply by choosing the wrong receipt method — only one of four options qualifies for tax-free treatment. Japan's Nikkei Average fell 4.7% in the July–September quarter, its first quarterly decline in six quarters, driven largely by a concentrated position in just four semiconductor and tech names, though the index surged roughly 1,600 points on October 1 after strong Micron Technology earnings. Meanwhile, Nidec (ニデック) faces a realistic delisting risk after auditor PwC Japan (PwCジャパン監査法人) issued a disclaimer of opinion on its FY2026 annual securities report, with a deadline at the end of October.
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What this episode answers
In what circumstances are dividends from NISA-held stocks subject to tax?
Tax at 20.315% applies when any method other than Proportional Distribution by Share Count is selected — the three bank- or postal-based alternatives do not qualify for NISA's tax exemption, meaning ¥100,000 in dividends would result in roughly ¥20,000 withheld.
How is the dividend receipt method managed when an investor holds accounts at multiple brokerages?
JASDEC (証券保管振替機構, nicknamed 'Furi' / ほふり) links every brokerage account to a single My Number ID and manages receipt methods centrally, so any change made at one broker overwrites the setting across all accounts; switching a non-NISA account at one firm to a bank-based method simultaneously cancels the tax-free setting on a NISA account held elsewhere.
Why did the number of rising stocks increase in July–September even as the Nikkei Average fell?
The Nikkei's decline was concentrated in four semiconductor and tech stocks — Advantest (アドバンテスト) at 12.5% of daily price contribution, Tokyo Electron (東京エレクトロン) at 8.83%, Fast Retailing (ファーストリテイリング) at 8.4%, and SoftBank Group (ソフトバンクグループ) at 7.4%, totaling 37% — while two-thirds of Prime Market stocks actually advanced over the quarter.
What irregularities led PwC Japan to disclaim an opinion on Nidec's annual securities report?
The annual report itself identifies five categories of misconduct: avoiding write-downs on unsaleable inventory by asserting residual asset value; booking low-probability transactions as revenue to avoid losses; using forced explanations to dodge impairment charges on fixed assets that should have been written down; capitalizing labor costs that should have been expensed; and falsifying documents to deceive auditors — all against a corporate culture under founder Nagamori Shigenobu (永守重信) in which 'losses are evil' and intense numerical targets prevailed.
If Nidec fails to obtain a clean audit opinion, what steps would lead to delisting?
If a clean opinion is not obtained by the end-of-October deadline, the Tokyo Stock Exchange board could designate Nidec shares as a supervised stock (管理銘柄) from November onward, after which the stock would move to rectification stock (整理銘柄) status before ultimately being delisted.
The NISA Dividend Trap: Only One of Four Methods Is Tax-Free
Even dividends from NISA-held stocks are taxable if the wrong receipt method is chosen. The applicable rate is 20.315%, meaning a ¥100,000 dividend would cost the investor roughly ¥20,000.
There are four receipt methods: ① Proportional Distribution by Share Count (株式数比例配分方式), ② Registered Dividend Receipt Account (登録配当金受領口座方式), ③ Individual Stock Designation (個別銘柄指定方式), and ④ Dividend Receipt Voucher (配当金領収書方式). Only method ① qualifies for NISA's tax-free treatment; dividends are deposited directly into the cash balance of the investor's NISA brokerage account. Methods ②–④ route dividends through bank accounts or post offices and are all taxable. Online brokerages typically default to method ① upon account opening.
One additional nuance: U.S. stocks held inside a NISA account remain subject to 10% U.S. withholding tax at source. This is a feature of the U.S.–Japan tax treaty rather than a flaw in the NISA system, but it differs from the treatment of domestic equities.
For reference, Nikkei Shimbun market data shows dividend yields of 1.75% for Nikkei 225 constituents, a simple average of 2.44% and a weighted average of 2.08% across the Prime Market as a whole. By comparison, the 10-year Japanese Government Bond yield stands at 3.1%, the 5-year at close to 2.4%, and the 2-year at 1.95% — JGB yields now exceed equity dividend yields across the curve.
The Multi-Account Trap: A Change at One Broker Overwrites All Accounts
A frequently missed pitfall affects investors with accounts at more than one brokerage. If, for example, an investor uses a NISA at Rakuten Securities (楽天証券) set to method ① but then changes a Nomura Securities (野村証券) account to a bank-based method, the NISA account at Rakuten is simultaneously overwritten to the new method.
The reason is that JASDEC (証券保管振替機構, nicknamed "Furi" / ほふり) uses My Number to manage every individual's receipt method centrally. Whatever change is made last becomes the setting across every account at every brokerage. Switching to a bank-based method also eliminates automatic tax-loss offset processing and requires filing a final tax return. Investors who use only the accumulation-type NISA — that is, only mutual fund distributions — are unaffected by this issue.
Japan Equities July–September: Index Falls for First Time in Six Quarters, but Two-Thirds of Stocks Rose
The Nikkei 225 fell 4.7% from end-June, posting its first quarterly decline since Q1 2025. Over the broader April–September six-month period, however, it gained 31%, far outpacing the Dow Jones Industrial Average (roughly 11%) and Germany's DAX (roughly 12%). Across the Prime Market as a whole, two-thirds of stocks advanced — up from 55% the prior quarter.
Notable individual movers in July–September included Yamaha (ヤマハ, +47%), Recruit (リクルート, +48%), and Bandai Namco (バンダイナムコ, +51%) on the upside, and Taiyo Yuden (太陽誘電, −54%) on the downside.
The index's quarterly decline reflected a correction in semiconductor-related stocks. As of September 29, Advantest accounted for 12.5% of the Nikkei's daily price contribution, Tokyo Electron 8.83%, Fast Retailing 8.4%, and SoftBank Group 7.4% — four companies totaling 37%. From October 1, Advantest's weighting coefficient was reduced from 7.2 to 6.4, though its influence on the index remains substantial.
On the recording date of October 1, Micron Technology's strong quarterly results — revenue up 4.5× year-on-year to over $61.5 billion for the September–November 2024 quarter, with gross margin improving more than 30 percentage points year-on-year to 86% — sent semiconductor stocks sharply higher. The Nikkei surged roughly 1,600 points to around 68,355, with Advantest contributing +648 points, Tokyo Electron +283, SoftBank Group +171, and Fast Retailing +137; those four stocks alone accounted for approximately 1,240 points of the gain. Because rising memory prices increase hardware production costs, Nintendo (任天堂) traded lower on the same day.
Nidec: Auditor Disclaims Opinion, Making Delisting Risk Real
PwC Japan issued a disclaimer of opinion on the FY2026 annual securities report (有価証券報告書) filed by Nidec. Audit opinions fall into four categories: ① unqualified (no issues), ② qualified (appropriate except for specified matters), ③ adverse, and ④ disclaimer. Categories ③ and ④ are classified as problematic. A disclaimer means the auditor was unable to obtain sufficient evidence to form an opinion because key audit procedures could not be carried out.
The Tokyo Stock Exchange weights audit opinions heavily in listing decisions. If a clean opinion is not obtained by the end-of-October deadline, the TSE board could designate Nidec shares as a supervised stock (管理銘柄) from November onward. The stock could then transition to rectification stock (整理銘柄) status before ultimately being delisted. The share price fell 18.5% around the time of the disclosure.
The annual report itself identifies five categories of misconduct: avoiding inventory write-downs by asserting residual asset value in unsaleable stock; booking low-probability transactions as revenue to avoid losses; using forced explanations to dodge impairment charges on fixed assets that should have been written down; capitalizing labor costs that should have been expensed, deferring charges to later periods; and falsifying documents to deceive the auditors. The report attributes the underlying cause to a corporate culture — entrenched under founder and former chairman Nagamori Shigenobu (永守重信) — in which "losses are evil" and extreme numerical targets created intense pressure on employees. Published accounts of Nagamori describe episodes such as constructing a company building just slightly taller than a rival's (Kyocera's / 京セラ) headquarters, and making late-night trips to check whether competitors' offices still had their lights on. Going forward, monetization through the sale of group companies is expected to proceed.
Takeaways
- NISA dividend income is only tax-free under the Proportional Distribution by Share Count method, and changing the method at any one brokerage automatically overwrites the setting across all accounts via JASDEC.
- The Nikkei Average fell 4.7% in July–September primarily because of its heavy concentration in Advantest and three other names — which together account for 37% of the index — while two-thirds of Prime Market stocks still rose over the quarter.
- PwC Japan's disclaimer of opinion on Nidec's FY2026 annual securities report makes a supervised-stock designation and eventual delisting a realistic outcome if no clean opinion is issued by end of October.
This article is edited from a machine transcript of the first 30 minutes of the episode. It is not an official summary — please listen to the episode itself.