The Ariake Line is a railway line in Japan that connects the cities of Koto and Toshima in the Tokyo metropolitan area. It is part of the Tokyo Waterfront Area Rapid Transit system and primarily serves the waterfront districts, facilitating easy access to various attractions and residential areas. The line features modern trains and stations, designed to accommodate the growing population and tourism in the region. It plays a crucial role in connecting major developments, such as the Tokyo Big Sight convention center and the Ariake area, enhancing transportation options for both locals and visitors.