Kansai International Airport, commonly known as 関空 , is the primary international airport in the Greater Osaka Area of Japan and the closest international airport to the cities of Osaka, Kyoto, and Kobe. It is located on an artificial island in the middle of Osaka Bay off the Honshu shore, 38 km (24 mi) southwest of Ōsaka Station, located within three municipalities, including Izumisano (north), Sennan (south), and Tajiri (central), in Osaka Prefecture. The airport's 1st airport island covers approximately 510 hectares and the 2nd airport island covers approximately 545 hectares, for a total of 1,055 hectares.

Keihanshin is a metropolitan region in the Kansai region of Japan encompassing the metropolitan areas of the cities of Kyoto in Kyoto Prefecture, Osaka in Osaka Prefecture and Kobe in Hyōgo Prefecture. The entire region has a population of 19,302,746 over an area of 13,228 km2 (5,107 sq mi). It is the second-most-populated urban region in Japan, containing approximately 15% of Japan's population.