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Akashi Kaikyo Bridge

Akashi Kaikyo Bridge

General Information

Structural Type: Suspension bridge
Function / usage: Motorway bridge / freeway bridge
Original name: 明石海峡大橋 (Akashi-Kaikyō Ōhashi)
Other name(s): Akashi Straits Bridge
Built: 1988 - 1998
Status: in use

Geographic Information & Related Structures

Location: Kobe, Hyogo, Japan, Asia
Awaji, Hyogo, Japan, Asia
  • Akashi Straits
Part of:
Location description:

The bridge connects Kobe on the island of Honshu (Japan) with Iwaya on Awaji Island while crossing the busy Akashi Strait.

Coordinates: 34° 37' 26.00" N    135° 1' 38.00" E
Coordinates: 34° 36' 34.00" N    135° 0' 54.00" E

Technical Information


main span 1 991 m
total length 3 911 m
pylons height 282.8 m


cables steel
pylons steel
deck truss steel


17 January 1995

While under construction the bridge remains largely unaffected by the Kobe earthquake.


The January 17, 1995 Kobe earthquake had its epicenter right between the two towers of the Akashi Straits Bridge. The original planned length was 1990 meters for the main span, but the seismic event moved the towers apart by almost a meter. Since construction of the deck had not yet begun, the change was easily accommodated in the slightly altered final design.

The towers of the bridge contain tuned mass dampers in order to diminish the vibrations in the structure during earthquakes and typhoons.

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