what part or island of japan is osaka located at
â¢ Honshu. Honshu is the largest island of Japan and it is where the majority of the country's cities are located (maps). The Tokyo Osaka-Kyoto area is the core Honshu and Japan and 25% of the island's population lives in the Tokyo region.apan is an island nation located in eastern Asia to the east of China, Russia, North Korea and South Korea. Its capital is Tokyo and it has a population of 126,475,664 people (July 2011 estimate).