Industrial port (iron, steel, shipbuilding, chemicals, textiles) on Honshu island; population (1987) 2,546,000, metropolitan area 8,000,000. It is the oldest city of Japan and was at times the seat of government in the 4th-8th centuries. Lying on a plain sheltered by hills and opening on to Osaka Bay, Osaka is honeycombed with waterways. It is a tourist centre for Kyoto and the Seto Inland Sea and is linked with Tokyo by fast electric train 200 kph/124 mph. An underground shopping and leisure centre 1951 has been used as a model for others throughout Japan. It was a mercantile centre in the 18th century, and in the 20th century set the pace for Japan's revolution based on light industries.