Tsumura

Selling Tsumura Life Science: leaving household products (2008)

Key decision·2008· Tsumura — the full company history →

The part that went on being a bath-additive company

The line of the withdrawal was drawn not by product category but by sales channel. What Tsumura let go was the household-products business, which competes for mass-retail shelf space on advertising spend — not bath additives as such. Bath Herb, formulated with crude-drug extracts, is still a Tsumura product, and it is helping lift healthcare-product sales of $41.4M (¥6bn) in the year to March 2025. Two things you put in the same bathtub, and the one whose selling point is an explanation of its herbs stayed while the one sold on fragrance and promotional volume went out. Look at what remained and the company’s criterion for sorting is easy to read.

On price, the sale worked out generously for the buyer. The company that went for $44.5M (¥5bn) passed to its next owner a little over three years later for $188M (¥15bn), revalued as the leading bath-additive business. From Tsumura’s side, however, there was no route that kept household products and still funded plant investment in prescription kampo and raw-material procurement in China. After some seventy years in which Bathclin, launched in 1930, paid the bills for herbal research, the direction of the cash flow reversed: kampo now funds its own growth.

Revenue and net margin, FY2003–FY2013

Revenue in ¥ bn (bars) and net margin in % (line), for the years around the decision. Shaded columns are FY2008 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 Tsumura


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 →


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Data API

Tsumura’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/4540/manifest.json Resource index
GET /api/4540/history.json History overview
GET /api/4540/timeline.json Chronology
GET /api/decisions.json All management decisions (index)
GET /api/4540/decisions.json Management decisions (index)
GET /api/4540/decisions/{slug}.json One decision (full dossier)
GET /api/4540/executives.json Executives
GET /api/4540/shareholders.json Major shareholders
GET /api/4540/financials.json Financial statements
GET /api/4540/financials-longterm.json Long-term results
GET /api/4540/segments.json Business segments
GET /api/4540/regions.json Sales by region
GET /api/4540/workforce.json Workforce