Minami Bisan-Seto Bridge 1988

Minami Bisan-Seto Bridge 1988

© Ttiger

The Bridge

The Japanese islands of Honshu and Shikoku are linked by a continuous series of 11 double-decked bridges to cross the 13km wide Seto Inland Sea. They carry two lanes of highway traffic in each direction on the upper deck and a railway line in each direction on the lower deck.

Three of the bridges are suspension bridges, two cable stayed, one truss and five viaducts. Collectively they are known as the Great Seto Bridge.

The northernmost bridge is the Shimotsui-Seto Bridge, with a 940m central span. The longest is the 1,100m-main-span Minami Bisan-Seto Bridge. It is the southernmost bridge and is a continuous suspension bridge, sharing an anchorage with the 990m-main-span Kita Bisan-Seto Bridge. They are stiffened-truss-deck suspension bridges.

Minami Bisan-Seto Bridge

Part of the Honshū-Shikoku Bridge Project

Key Facts

Longest main span bridge of the Great Seto Bridge

Four-lane motorway, upper deck

Two railway tracks, lower deck


Sakaide, Kagawa, Japan

Crosses Seto Inland Sea

Linking Japanese islands, Honshu and Shikoku

Designers / Engineers

Honshu Shikoku Bridge Authority


Suspension bridge

1,100m main span

1,723m total length

Main contractors

Ishikawajima-Harima Heavy Industries

Kawasaki Heavy Industries

Mitsubishi Heavy Industries Ltd.

Yokogawa Bridge Corporation


Began 16 January 1979

Opened 10 April 1988

Other long-span bridges