AH1


Asian Highway 1 is the longest route of the Asian Highway Network, running from Tokyo, Japan via Korea, China, Southeast Asia, Bangladesh, India, Pakistan, Afghanistan and Iran to the border between Turkey and Bulgaria west of Istanbul where it joins end-on with European route E80.

Japan

The 1200-kilometre section in Japan was added to the system in November 2003. It runs along the following tolled expressways:
Camellia Line ferry to Busan, South Korea.
From Fukuoka, the Japan–Korea Undersea Tunnel has been proposed to provide a fixed crossing.

South Korea

The section in South Korea mainly follows the Gyeongbu Expressway. The Highway Boundary of South and North Korea.
The route AH1 is also marked as in Turkey. The E80 continues in the E-road network from the border station at Kapitan Andreevo/Kapıkule to Sofia in Bulgaria, followed by E80 highways to Niš, Pristina, Dubrovnik, Pescara, Rome, Genoa, Nice, Toulouse, Burgos, Valladolid, Salamanca and finally Lisbon on the Atlantic Ocean.