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Sumitomo Heavy Industries

Japan · Founded 1888

The Oppama yard that launched the longest ship ever built.

Ships here1
Longest458.45 m
Deliveries1979–1979
Still in service0
The yard

The story so far

Sumitomo's Oppama shipyard on Tokyo Bay built the hull that became Seawise Giant, delivered in 1979 and then jumboised to 458.45 metres, the longest ship in history, a record that has outlived the yard's own large-ship era.

Sumitomo Heavy Industries has since concentrated on mid-size tankers and machinery, but its name is permanently attached to the upper bound of the length record board.

The line-up

Sumitomo Heavy Industries ships

Side profiles are sized by real length overall, longer ships draw bigger. Categories are never mixed.

Seawise Giant

C.Y. Tung / later owners · Scrapped 2010

Length overall458.45 m: longest ship ever
Beam68.8 m
Deadweight564,763 t
Gross tonnage260,941 GT
Full specification →
Side by side

Every ship, ranked by length

ShipCategoryLengthBeamDeliveredStatus
Seawise GiantTanker458.45 m68.80 m1979Scrapped 2010