Fukuoka Airport, which is Kyushu’s largest International Airport, is connected by direct flights with 23 overseas cities, most of which are in Asia. For cities such as Seoul, Shanghai and Taipei, there are several flights a day. In addition, airports have been developed in all Kyushu Prefectures, and there are regular flights to China and South Korea from Nagasaki, Oita, Kumamoto, Miyazaki and Kagoshima Airports. Kyushu has approximately 1,000 km in expressways, and day trips between major cities are possible. Kyushu has 25 important ports, including the 11 ports that have regular international shipping services. The rail network covers the whole of Kyushu and following the partial opening of the Kyushu Shinkansen in March 2004, users have access to an even more convenient transport network. In most Prefectures within Kyushu, gigabit-class networks are maintained. Fukuoka and Kitakyushu Cities provide a perfect network environment for businesses, as they are connected by fiber-optic cabling that runs between them and South Korea’s Busan.