The Tōkaidō Shinkansen is a high-speed train line in Japan that connects Tokyo and Osaka. It is one of the busiest and most famous Shinkansen lines, covering a distance of about 515 kilometers (320 miles). The trains can reach speeds of up to 300 kilometers per hour (186 miles per hour), making travel between these major cities quick and efficient. Opened in 1964, the Tōkaidō Shinkansen revolutionized rail travel in Japan and set the standard for high-speed trains worldwide. It features several types of trains, including the Nozomi, Hikari, and Kodama, each offering different levels of service and travel times.