Working-practice reform and a change of president after a new employee’s death from overwork (2016)
The author’s view
The weight of Dentsu’s working-practice reform lies in the fact that, prompted by the death of a single first-year employee, it reached the value system itself of a company that had put growth above all else. The process by which President Ishii Tadashi took responsibility and resigned and President Yamamoto Toshihiro raised a plan with numerical targets carried the colour of self-repudiation directed at an advertising industry that had treated long hours as the guarantee of quality. The change at the top and the symbolic measure of shutting off the lights across the entire building can be seen as the trigger for a change in the culture.
Still, the structural wall inherent in being an agency is hard to clear through internal reform alone. As long as the trading conventions that translate a client’s requests directly into the burden on the working floor go untouched while numerical targets run ahead, the concern remains that the strain simply persists in a less visible form. Whether the reconsideration of growth built on the price of overwork reaches as far as a redesign of working practices across the whole industry is something that has to be judged alongside the later global restructuring and the swings in performance.
Revenue and net margin, FY2011–FY2021
Revenue in ¥ bn (bars) and net margin in % (line), for the years around the decision. Shaded columns are FY2016 onwards — after it was taken.
Source: securities reports
Read the full dossier in Japanese →
The Japanese edition carries the complete record of this decision — the situation that forced it, the options weighed, what actually followed, and the sources behind every claim.
Other key decisions at Dentsu Group
- 1998 The king of advertising at a crossroads: reorganization, and the groundwork for listing and expansion abroad (1998)
- 2000 A joint venture with marchFIRST: consulting for the internet age (2000)
- 2001 Listing on the TSE after a century — the advertising giant that went public without needing the money (2001)
- 2012 The acquisition of Britain’s Aegis Group — the largest overseas M&A ever by a Japanese advertising company (2012)
- 2025 The vast impairment of the overseas business (Dentsu International) and the turn away from M&A (2025)
Yen amounts are converted at the average rate of each figure’s own year — not today’s rate; the revenue chart is shown in yen. Exchange rates & sources — the full ¥/US$ table →
Disclaimer
- This page is provided for general information only and is not investment advice, nor a recommendation to buy or sell any security.
- Figures are compiled independently and include our own estimates, approximations and machine-processed data; we make no warranty as to their accuracy or completeness.
- Sources are primarily each company’s securities reports and other public filings, but errors and omissions may remain.
- Any use of this information is at the reader’s own risk. Past performance does not indicate future results.
- Company names, logos and other marks belong to their respective owners.
Data API
Dentsu Group’s history, financials, executives and
shareholders are published as static JSON — no key, plain GET.
Full specification →
| Method | Endpoint | Returns |
|---|---|---|
| GET | /api/companies.json | All companies |
| GET | /api/4324/manifest.json | Resource index |
| GET | /api/4324/history.json | History overview |
| GET | /api/4324/timeline.json | Chronology |
| GET | /api/decisions.json | All management decisions (index) |
| GET | /api/4324/decisions.json | Management decisions (index) |
| GET | /api/4324/decisions/{slug}.json | One decision (full dossier) |
| GET | /api/4324/executives.json | Executives |
| GET | /api/4324/shareholders.json | Major shareholders |
| GET | /api/4324/financials.json | Financial statements |
| GET | /api/4324/financials-longterm.json | Long-term results |
| GET | /api/4324/segments.json | Business segments |
| GET | /api/4324/regions.json | Sales by region |
| GET | /api/4324/workforce.json | Workforce |