Tsuneishi Holdings

Tsuneishi Group is a corporate group headquartered in Hiroshima that operates shipbuilding, shipping, environment, energy, and life & resort businesses. Its official company name is Tsuneishi Group Corporation (常石グループ株式会社), and it was established on April 30, 1942. The group traces its origins to 1903, when Katsutaro Kanbara founded a shipping business with coal transport vessels, and states that it has grown over more than 120 years of history.

The group's history page states that over more than 120 years since its founding, Tsuneishi Group has repeatedly taken on challenges and grown. In 1903, Katsutaro Kanbara founded a shipping business with coal transport vessels. In 1917, the Shiohama Shipyard, predecessor of Tsuneishi Shipbuilding, was opened, and in 1942 Tsuneishi Shipbuilding was established through the reorganization of Shiohama Shipyard. The group later expanded across shipping, shipbuilding, trading & energy, environment, and life & resort businesses, including the 1994 establishment of the new shipbuilding yard TSUNEISHI HEAVY INDUSTRIES (CEBU) in the Philippines and the 2003 launch of the new shipbuilding yard Tsuneishi Group (Zhoushan) Shipbuilding in China. In 2007, as part of a group reorganization, Sumihiro was renamed Tsuneishi Holdings Sumihiro Company, and in 2011 it was renamed Tsuneishi Shoji following a spin-off. In 2022, Mitsui E&S Shipbuilding, Niigata Shipbuilding & Repair, Yura Dock, and Kanda Dock became subsidiaries. In 2025, several subsidiaries were renamed, including Mihara Shipyard becoming Tsuneishi Mihara Shipbuilding, Kanda Dock becoming Tsuneishi Kure Dock, Mitsui E&S Shipbuilding becoming Tsuneishi Solutions Tokyo Bay, Yura Dock becoming Tsuneishi Yura Dock, and Mitsui Engineering & Shipbuilding Akishima Laboratories becoming Tsuneishi Shipbuilding Akishima Laboratories; Niigata Shipbuilding & Repair was absorbed through a merger into Tsuneishi Mihara Shipbuilding.

1. 1常石グループtsuneishi-g.jp
2. 2歴史・沿革 ｜ 常石グループtsuneishi-g.jp
3. 3会社概要 ｜ 常石グループtsuneishi-g.jp
4. 4サイトご利用条件について ｜ 常石グループtsuneishi-g.jp
5. 5Tsuneishi Holdingswikidata.org