--- title: "Nidec: who left, who replaced them and what oversight changed" language: en canonical: https://dossiertwist.com/dossiers/nidec/board-renewal/ as_of: 2026-10-06 keywords: ["Nidec","accounting","corporate governance","audit","quality","subsidiaries"] --- # Nidec: who left, who replaced them and what oversight changed **Question.** How did Nidec change its management and oversight after the investigations? **Answer.** March departures, June board renewal and September executive changes were separate events. Dated roles make the transition visible without turning office-holding into an allegation of wrongdoing. ## Departures and a new board - Analysis: Nidec says Hiroshi Kobe, Yoshihisa Kitao, Akinobu Samura and Tatsuya Nishimoto resigned all group positions on 3 March 2026 following the accounting report. Valter Taranzano’s duties were suspended on 2 March and he left on 23 March. These are company personnel measures, not judicial findings of individual liability. Their prior responsibilities differed: Kobe was board chair; Kitao covered SPMS and group companies; Samura was CFO; Nishimoto led machinery; Taranzano led the appliance and automotive division. [s-d10] - Analysis: The annual filing records a major June 2026 board renewal. Sato, Komatsu and Sakai left their outside-director positions on 18 June; Ochiai, Yamada, Toyoshima and Umeda left their audit-and-supervisory committee directorships that day. Nine new directors were elected. The dates establish office changes, not reasons or misconduct. Yoshii had joined on 20 June 2025; Murakami left the parent’s audit-and-supervisory committee directorship that day. [s-d10] - Analysis: The filing distinguishes board seats from advisory committees: Kishida left the nomination committee on 26 March 2026, while his compensation-committee role ended on 18 June. Nagamori had left the compensation committee on 20 June 2025. The June renewal put Yamamoto, Koizumi, Sakuma and Nishiura on both advisory committees. Committee dates are not interchangeable with executive or statutory-director tenures. [s-d10] ## The oversight network and its limits - Analysis: The annual filing places Yoshii as statutory auditor at several machinery and service subsidiaries from July 2025, with Components added in June 2026. Yamazaki’s June 2026 appointments include statutory-auditor roles at Instruments, Powertrain, Precision and Mobility. These oversight capacities are distinct from managing the subsidiaries or being responsible for past accounting events. The filing does not mark Yoshii’s Machinery position as continuing, so it is preserved only as a historical appointment. [s-d10] - Analysis: Nidec says it expanded outside oversight, created a board-support office in June 2026 and revised executive selection, reporting and remuneration processes. Its audit-and-supervisory committee judged PwC’s performance for the year appropriate and voted to reappoint it; all but one engagement partner had changed after receipt of the February report. This is the company’s governance assessment, not an independent finding that controls were already effective. The subsequent auditor disclaimers and continuing evidence problems remain material. [s-d10] ## Historical appointments and the limits of office-holding - Analysis: The 2023 annual filing records Murakami as statutory auditor of seven named subsidiaries and Ochiai of seven others, including entities later renamed or merged. Their parent audit-and-supervisory committee seats and their subsidiary statutory-auditor capacities are separate mandates. The graph preserves the filing’s dated appointments as historical snapshots. It does not extend those positions indefinitely or identify these officers as the anonymous people criticised in the investigation. [s-d11] [s-d299] - Analysis: Historical filings record Takeshi Nakane’s audit-and-supervisory committee directorship ending on 12 October 2022, Junko Watanabe succeeding him the next day, and Tamame Akamatsu leaving on 20 June 2023 when Hiroe Toyoshima joined. Watanabe’s committee directorship ended on 18 June 2024. Appointment dates, committee membership and attendance periods differ. They are not converted into a common tenure or a collective allegation of misconduct. [s-d299] [s-d46] - Analysis: The historical annual tables show several executives holding subsidiary chairmanships alongside parent offices: Nagamori at Shimpo, Mobility and Techno Motor; Seki at Nidec India and Tosok; Kishida at Powertrain, Elesys and Mobility; and Kobe at Techno Motor and Global Service. The graph uses each table’s stated appointment and snapshot, not an invented continuous term. Tosok became Powertrain; Shimpo became Drive Technology. Elesys’s later absorption into Mobility is separately dated. These positions do not establish responsibility for an episode described anonymously. [s-d46] [s-d47] ## Parent offices and a disclosed outside affiliation - Analysis: The annual tables distinguish Seki’s president/COO appointment in April 2020, CEO appointment in June 2021 and return to COO in April 2022 from Kobe’s September 2022 president/COO appointment and April 2024 board chairmanship. Kishida became president/CEO in April 2024 and representative director that June. These are dated historical capacities. The later resignations and the committee’s differentiated responsibility findings are recorded separately; the position itself is not proof of misconduct. [s-d46] [s-d47] - Analysis: Nidec’s 2022 filing lists outside director Takeshi Nakane’s March 2018 appointment to the board of Kyoto Gakuen, later Nagamori Gakuen. The same filing lists Nagamori as chairman of that educational corporation. The affiliation is a historical institutional connection, not a finding of compromised independence or accounting responsibility. The company stated that it had no special relationship of interest with Nakane or the institutions to which he belonged and described its outside-director selection as intended to preserve independence. [s-d47] ## Sources - [s-d10] Company statement source · s-d10 - [s-d11] Research source · s-d11 - [s-d299] Company statement source · s-d299 - [s-d46] Company statement source · s-d46 - [s-d47] Company statement source · s-d47