The Bayshore Route (湾岸線, Wangan-sen), signed as Route 4, is one of the routes of the Hanshin Expressway system serving the Keihanshin area.

It is an intercity route that travels in a north to south direction from Osaka to Izumisano near Kansai International Airport.

It has a total length of 32.7 kilometers (20.3 mi).

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