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Watchmaker profile

Yoshikazu Akahane

Yoshikazu Akahane originated the quartz-regulated mechanical concept and championed the development programme that became Spring Drive. 1

Team development, not sole construction; commercialization followed his death.

At a glance

Place
Japan
Dates
?–1998 1Museum history explicitly records Akahane's death in August 1998; birth year is not inferred from the reported age.

The watchmaking story

Useful places to start with Yoshikazu Akahane's work include Quartz Lock patent (1978) and Spring Drive.

Yoshikazu Akahane worked for or held a role at Suwa Seikosha and Seiko Epson. 1

Scope: Direct watchmaking

Why this person is included

Documented original work

Background and working context

Affiliations and workshops: Suwa Seikosha; Seiko Epson

Geographic ties: Japan. Documented workplace / industry location

Brands, workshops, and other relationships

  1. Movement / component supplier or manufacturer · Inherited source-linked record; relationship classification reviewed, sources not reopened

    Suwa Seikosha — Worked for / held role. Watch-development engineer 1

    Legacy affiliation: Suwa Seikosha; Seiko Epson. Person-level contribution: Originated the quartz-regulated mechanical concept and championed the development programme that became Spring Drive.

    Original affiliation wording: Suwa Seikosha; Seiko Epson. No present-day employment or ownership inferred.

  2. Movement / component supplier or manufacturer · Inherited source-linked record; relationship classification reviewed, sources not reopened

    Seiko Epson — Worked for / held role. Watch-development engineer 1

    Legacy affiliation: Suwa Seikosha; Seiko Epson. Person-level contribution: Originated the quartz-regulated mechanical concept and championed the development programme that became Spring Drive.

    Original affiliation wording: Suwa Seikosha; Seiko Epson. No present-day employment or ownership inferred.

Evidence and limitations

This dossier connects 4 field-specific evidence records with 1 public source. Known links only; full career not established

Claim qualifications (4)
  • Noteworthy contribution: Maker/house biography; scoped attribution, not independent manufacturing or priority validation. 1
  • Specific role: Maker/house biography; scoped attribution, not independent manufacturing or priority validation. 1
  • Death year: Museum/house history; date is explicit rather than calculated from age. 1
  • Date qualification: Museum/house history; date is explicit rather than calculated from age. 1

Sources

  1. Spring DriveThe Seiko Museum Ginza · Museum / archive · Not stated

    [S0106] The Seiko Museum Ginza. "Spring Drive." Not stated. https://museum.seiko.co.jp/en/seiko_history/milestone/a6946f3e0078a97d44d08dd303293ba0d8ca8430/ Accessed 2026-09-13.

    Source context

    Relationship to subject: Museum / archive custodian

    How it was checked: Opened and read

    Limitation: Post-consolidation gap-resolution pass: Original source text inspected; not independent corroboration of every profile clause.

Corrections and stronger evidence

Names, dates, and workshop relationships can change as archives are digitised. If you have a primary source that clarifies this record, use the correction process.

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