Seibu Ikebukuro Line

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Seibu Ikebukuro Line
Seibu 001 series near Nishi-Tokorozawa Station, October 2021
Overview
Native name	西武池袋線
Owner	Seibu Railway
Locale	Kanto region
Termini	Ikebukuro Agano
Stations	31
Service
Depot(s)	Kotesashi
Daily ridership	892,025 (2010)[1]
History
Opened	15 April 1915
Technical
Line length	57.8 km (35.9 mi)
Track gauge	1,067 mm (3 ft 6 in)
Minimum radius	200 m (660 ft)
Electrification	1,500 V DC, overhead catenary
Operating speed	105 km/h (65 mph)[2]

The Seibu Ikebukuro Line (西武池袋線, Seibu Ikebukuro-sen) is a railway line of the Japanese private railway operator Seibu Railway. It originates at Ikebukuro Station, a large railway junction in north-western Tokyo, extending to northwest suburbs as far as Tokorozawa, Saitama, and nominally terminates at Agano Station.

The Seibu Chichibu Line from Agano to Seibu-Chichibu Station is an extension. The operation is largely divided into two sections: from Ikebukuro to Hannō Station and from Hannō to Seibu-Chichibu Station.

The section from Hannō to Seibu-Chichibu is single track, but every station except for Higashi-Hanno has passing loops, and trains may pass each other at any stop. There is also a passing loop inside a tunnel where the signal controls bi-directional operation. The rest of all the lines is double track with 1,067 mm (3 ft 6 in) track gauge.