The Tokyo Metro Fukutoshin Line is a subway line in Tokyo, Japan, operated by the Tokyo Metro company. It connects the northern part of the city, starting from Shibuya, to Wako-shi in Saitama Prefecture. The line is known for its modern trains and efficient service, making it a popular choice for commuters and travelers. Opened in 2008, the Fukutoshin Line features 21 stations, including key stops like Ikebukuro and Shinjuku. It also connects with several other lines, enhancing accessibility to various parts of Tokyo and beyond. The line is an essential part of the city's extensive public transportation network.