The Shonan-Shinjuku Line is a commuter train service in Japan, operated by the East Japan Railway Company (JR East). It connects the Shonan area in Kanagawa Prefecture to Shinjuku Station in Tokyo, providing a vital link for daily commuters. The line runs through several key stations, including Kawasaki and Ikebukuro, making it convenient for passengers traveling between these regions. This line is part of the larger Tokyo metropolitan railway network and offers both local and rapid services. It was inaugurated in 2001 and has since become an essential transportation option for residents and visitors, facilitating easy access to various urban and suburban areas.