The Rinkai Line is a railway line in Japan that connects the city of Tokyo to Saitama Prefecture. It is operated by the Tokyo Waterfront Area Rapid Transit and primarily serves the waterfront areas, including the popular Odaiba district. The line is known for its modern trains and scenic views of Tokyo Bay. Opened in 2001, the Rinkai Line spans approximately 15 kilometers and features both elevated and underground sections. It provides convenient access to various attractions, such as Tokyo Joypolis and Palette Town, making it a popular choice for both locals and tourists exploring the waterfront region.