The Tokyo Metro Yurakucho Line (東京地下鉄有楽町線 Tōkyō Chikatetsu Yūrakuchō-sen?) is a subway line in Japan owned and operated by the Tokyo subway operator Tokyo Metro. The line connects Wakōshi Station in Wakō, Saitama and Shin-Kiba Station in Kōtō, Tokyo. On maps, diagrams and signboards, the line is shown using the color “gold” ( ), and its stations are given numbers using the letter “Y”.
The proper name as given in an annual report of the Ministry of Land, Infrastructure and Transport is Line No. 8 Yūrakuchō Line (8号線有楽町線 Hachi-gō-sen Yūrakuchō-sen?).[2] According to the Tokyo urban transportation plan, however, it is more complicated. The line number assigned to the section south from Kotake-Mukaihara to Shin-Kiba is Line 8, but that of north of Kotake-Mukaihara to Wakōshi is Line 13, which indicates the section is a portion of Fukutoshin Line which shares the same number.[citation needed]
