Mitsui O.S.K. Lines

The equal merger with Navix Line and the name Mitsui O.S.K. Lines (1998)

Key decision·1998· Mitsui O.S.K. Lines — the full company history →

Gaining scale without building ships

President Ikuta said that increasing ships becomes a factor that disturbs the market, and bought scale in companies rather than in vessels. A 40% stake in Gearbulk, the acquisition of Tokyo Marine, the purchase of an LNG shipping company from Burmah of Britain, and then the merger with Navix Line. In an industry where adding your own tonnage means breaking your own freight rates, taking over another owner’s fleet avoids increasing the total. The fact that he had approached President Hori half a year before the NYK–Showa Line announcement appears to support this reading.

Even after the reshuffle, however, liner shipping still made up 40% of the business, and the losses that sat there remained. In 2002 container freight rates stuck at historic lows, and as executive officer Kato put it, the more you loaded the more you lost — diluting the proportion did not change the economics of the business itself. The corporate name was changed to Mitsui O.S.K. Lines, resolving the naming problem left by the 1964 merger; but the liner cargo that the same merger had taken on was carried forward until the three Japanese lines carved the container business out in 2016.

Revenue and net margin, FY1993–FY2003

Revenue in ¥ bn (bars) and net margin in % (line), for the years around the decision. Shaded columns are FY1998 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 Mitsui O.S.K. Lines


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

Mitsui O.S.K. Lines’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/9104/manifest.json Resource index
GET /api/9104/history.json History overview
GET /api/9104/timeline.json Chronology
GET /api/decisions.json All management decisions (index)
GET /api/9104/decisions.json Management decisions (index)
GET /api/9104/decisions/{slug}.json One decision (full dossier)
GET /api/9104/executives.json Executives
GET /api/9104/shareholders.json Major shareholders
GET /api/9104/financials.json Financial statements
GET /api/9104/financials-longterm.json Long-term results
GET /api/9104/segments.json Business segments
GET /api/9104/regions.json Sales by region
GET /api/9104/workforce.json Workforce