The is a section of the Tobu Isesaki Line operated by the private railway company Tobu Railway, extending from Asakusa Station in Tokyo to Tōbu-Dōbutsu-Kōen Station in Saitama Prefecture. Some trains from the line continue to the Tokyo Metro Hibiya Line and Tokyo Metro Hanzōmon Line. This section was branded the Tobu Skytree Line on 17 March 2012 in conjunction with the opening of the Tokyo Skytree Tower (which Tobu Railway owns). However, in through services with the Hibiya line, the Tobu SkyTree Line actually does not stop anywhere near the Tokyo SkyTree.
Description
Track
Quadruple: − 1.3 km, − 18.9 km
Double: Rest of the line
Note that Oshiage Station is officially an extension or part of Tokyo Skytree. The double tracks between Oshiage and Hikifune are thus the third and fourth tracks of the Tokyo Skytree − Hikifune section.
Operation
All-stations "Local" services operate from to , and , and onward to on the Tōbu Nikkō Line. Some peak-hour Local services from Asakusa terminate at Takenotsuka, Kita-Koshigaya, or Kita-Kasukabe.
Through trains
The Skytree Line has trains that inter-run with two Tokyo Metro subway lines. One is the Tokyo Metro Hibiya Line connected at , with all-station stop "Local" trains only. The other is the Tokyo Metro Hanzōmon Line at Oshiage, running as either local, semi-express or express trains within the subway line and the Tokyu Denentoshi line. Beyond , the terminus of the Hanzomon Line, nearly all trains continue to and from the Tokyu Den-en-toshi Line, down to the terminus of .
To the north, trains run via the Yagan Railway to the Aizu Railway's Aizutajima Station.
Service patterns
Stops and operated sections are as of 2013. (announced as or for short) (L) Asakusa − Kita-Senju. 6 cars. of Tokyo Metro Hibiya Line − Kita-Senju − Takenotsuka - Kita-Koshigaya - Kita-Kasukabe - Tobu-Dobutsu-Koen - Minami-Kurihashi. 7 cars. (SSE) Between Asakusa and Kita-Koshigaya, Kita-Kasukabe, Tōbu-Dōbutsu Kōen, Kuki, Tatebayashi (Isesaki Line) or Minami-Kurihashi (Nikkō Line). 6 cars. (SmE) Early morning and late night. Down to Kita-Koshigaya, Tōbu-Dōbutsu-Kōen, Kuki or to Minami-Kurihashi on the Nikkō Line through from Chūō-Rinkan on the Tokyu Den-en-toshi Line via the Hanzomon Line. 10 cars. (SE) Between Asakusa and Tōbu-Dōbutsu-Kōen, Kuki, Tatebayashi (Isesaki Line) or Minami-Kurihashi (Nikkō Line). 6 cars. (Ex) From morning to night. Down to Tōbu-Dōbutsu-Kōen, Kuki (nearly half to Minami-Kurihashi on the Nikkō Line), through from Chūō-Rinkan on the Tokyu Den-en-toshi Line via Hanzōmon Line. 10 cars. (LE) Stops not shown. Charged for seat reservation and rapid service. Mainly through to the Nikkō Line for the Nikko area named , , and and and and . Some through to Isesaki from Asakusa, sole direct service named and . Some through to/from Kuki from/to Ebisu on Hibiya Line, sole direct service named . Some through to Kasukabe from Asakusa, sole direct service named . Some through Ōmiya/Kashiwa from Asakusa, sole direct service named .
Stations
S: Stop
*1: To on Tokyo Metro Hibiya Line. *2: To on Tokyu Den-en-toshi Line via Tokyo Metro Hanzomon Line *3: Through to Nikkō Line *4: Through to Isesaki Line *5: Terminating Services from on the Tokyo Metro Hibiya Line *6: Terminating Services from on Tokyu Den-en-toshi Line via Tokyo Metro Hanzomon Line KN・KG: The stations which are marked "KN・KG" are stopped by Limited Express Kinu and Kegon trains RM: The stations which are marked "RM" are stopped by Limited Express Ryomo trains RV RM: The stations which are marked "RV RM" are stopped by Limited Express Revaty Kinu and Revaty Kegon and Revaty Aizu and Revaty Ryomo trains RV KG・KN: The stations which are marked "RV RM" are stopped by Limited Express Revaty Kinu, Revaty Kegon and Revaty Aizu trains SL: The stations which are marked "SL" are stopped by Limited Express Skytree Liner trains UL: The stations which are marked "UL" are stopped by Limited Express Urbanpark Liner trains TH: The stations which are marked "TH" are stopped by Limited Express TH Liner trains KF: The stations which are marked "KF" are stopped by Limited Express Kirifuri trains *Limited Express: Limited Express which are marked * travel to Asakusa stop at Hikifune station in the morning and they travel to Kasukabe or Tōbu-Dōbutsu-Kōen direction stop at Hikifune Station in the evening.