page_title: Tokyo Metro Yūrakuchō Line
section_title: History
hierarchical_section_title: Tokyo Metro Yūrakuchō Line / History
caption_attribution_description: English: Tokyo Metro Yūrakuchō Line plan
context_page_description: The Tokyo Metro Yurakucho Line is a subway line in Japan owned and operated by 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 line was named after the Yūrakuchō business district in Chiyoda, Tokyo. The proper name as given in an annual report of the Ministry of Land, Infrastructure and Transport is Line No. 8 Yūrakuchō Line. 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 north of Kotake-Mukaihara to Wakōshi is Line 13, which indicates the section is a portion of Fukutoshin Line which shares the same number.
context_section_description: October 30, 1974: Ikebukuro – Ginza-itchōme opens.
  March 27, 1980: Ginza-itchōme – Shintomichō opens.
  June 24, 1983: Eidan Narimasu (present Chikatetsu Narimasu) – Ikebukuro
  October 1, 1983: Seibu Railway Seibu Yūrakuchō Line Kotake-Mukaihara – Shin-Sakuradai opened, through operation.
  August 25, 1987: Wakōshi – Eidan Narimasu. Through service to Tōbu Tōjō Line.
  June 8, 1988: Shintomichō – Shin-kiba, current line completed.
  March 18, 1993: 07 series EMUs introduced.
  December 7, 1994: Quadruple-track from Kotake-Mukaihara to Ikebukuro. New double track section was named "Yūrakuchō New Line", all trains made Ikebukuro their terminus, and did not stop at Senkawa nor Kanamechō. Through service from Shin-Kiba or Ikebukuro (on the New Line) to Nerima on Seibu Yūrakuchō Line due to completion of the line.
  March 26, 1998: Through operation to Seibu Ikebukuro Line .
  April 1, 2004: According to its privatization, the management subject changed from Teito Rapid Transit Authority (TRTA, Eidan) to Tokyo Metro.
  October 31, 2005: Women-only cars introduced.
  September 1, 2006: 10000 series introduced.
  May 3, 2008: Limited Express "Bay Resort" (operated first from/to Odakyu Line)
  June 14, 2008: Tokyo Metro Fukutoshin Line began service. Yurakuchō New Line annexed to a part of Fukutoshin Line, and Yurakuchō Line share double tracks with Fukutoshin Line between Wakōshi and Kotake-Mukaihara. Semi-Express service started.
  October 2008: CS-ATC enabled on the Yurakuchō Line.
  March 6, 2010: Semi-express services abolished.
  From 10 September 2012, 10-car 5050-4000 series sets entered revenue service on the Yurakucho Line, with inter-running through to the Tobu Tojo Line.
caption: Tokyo Metro Yurakucho Line plan
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