The Tokaido Shinkansen is a high-speed train line in Japan that connects the cities of Tokyo, Nagoya, and Osaka. It is one of the busiest and most famous Shinkansen lines, covering a distance of approximately 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 Tokaido 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. The line is known for its punctuality, safety, and comfort.