Akō Line
213 series EMU on an Akō Line local service at Osafune Station
Overview
Native name	赤穂線
Owner	JR West
Locale	Hyogo Prefecture and Okayama Prefecture
Termini	Aioi Higashi-Okayama
Stations	19
Service
Type	Passenger/freight
System	Urban Network (Aioi - Banshū-Akō)
Operator(s)	JR West JR Freight
Rolling stock	113 series EMU 115 series EMU 117 series EMU 213 series EMU 221 series EMU 223-1000 series EMU 223-2000 series EMU 223-6000 series EMU 225-0 series EMU 225-100 series EMU
History
Opened	1951
Technical
Line length	57.4 km (35.7 mi)
Track gauge	1,067 mm (3 ft 6 in)
Electrification	1,500 V DC overhead line
Operating speed	85 km/h (53 mph)

Akō Line (赤穂線, Akō-sen) is a railway line owned by West Japan Railway Company (JR West) between Aioi, Hyōgo to Okayama, Okayama in Japan. A loop line off the Sanyō Main Line, the Akō Line commences at Aioi, is situated south of the main line approximately paralleling the Seto Inland Sea, and rejoins the main line at Higashi-Okayama.

The entire 57.4-kilometre (35.7 mi) line is single track. Only one train runs the entire length of the line, with service divided at Banshū-Akō, and no trains terminate at either of the official terminals. Trains from the east continue from Himeji on the Sanyō Main Line and terminate at Akō, while westbound services originating from Akō continue past Higashi-Okayama and continue on the Sanyō Main Line to Okayama and beyond. "Rapid" and "Special Rapid" trains from Kyoto and beyond make local stops between Aioi and Banshū-Akō, and the segment of the line is part of JR West's Kinki region Urban Network.

The line is split into two sections at Banshū-Akō Station, where passengers would have to interchange for train services to/from the Keihanshin region and the Okayama region.

Common name	Official line name	No.	Station	Japanese	Distance (km)	Transfers	Location
							City	Prefecture
Sanyō Main Line	Sanyō Main Line	JR-A85	Himeji	姫路		Sanyō Shinkansen JR Kobe Line ( A85 ) Bantan Line Kishin Line	Himeji	Hyōgo
			Agaho	英賀保
			Harima-Katsuhara	はりま勝原
			Aboshi	網干
			Tatsuno	竜野			Tatsuno
			Aioi	相生	0.0	Sanyō Shinkansen Sanyō Main Line	Aioi	Hyōgo
Akō Line	Akō Line
			Nishi-Aioi	西相生	3.0
			Sakoshi	坂越	7.8		Ako
			Banshū-Akō	播州赤穂	10.5	Akō Line (for Okayama)
Akō Line						Akō Line (for Himeji)
			Tenwa	天和	14.5
			Bizen-Fukukawa	備前福河	16.4
		JR-N16	Sōgo	寒河	19.6		Bizen	Okayama
		JR-N15	Hinase	日生	22.1
		JR-N14	Iri	伊里	27.7
		JR-N13	Bizen-Katakami	備前片上	31.0
		JR-N12	Nishi-Katakami	西片上	32.3
		JR-N11	Inbe	伊部	34.5
		JR-N10	Kagato	香登	38.5
		JR-N09	Osafune	長船	42.3		Setouchi
		JR-N08	Oku	邑久	45.9
		JR-N07	Odomi	大富	48.0
		JR-N06	Saidaiji	西大寺	51.2		Higashi-ku, Okayama
		JR-N05	Ōdara	大多羅	54.1
		JR-N04	Higashi-Okayama	東岡山	57.4	Sanyō Main Line	Naka-ku, Okayama
Sanyō Main Line	Sanyō Main Line
		JR-N03	Takashima	高島
		JR-N02	Nishigawara	西川原
		JR-N01	Okayama	岡山		Sanyō Shinkansen Sanyō Main Line Tsuyama Line Uno Line ( Seto-Ōhashi Line) Kibi Line (Momotaro Line) Okayama Electric Tramway Higashiyama Main Line	Kita-ku, Okayama

The initial section between Aioi and Banshu-Ako opened in 1951, and the line was opened progressively, to Hinase in 1955, Inbe in 1958, and Higashi-Okayama in 1962. The Aioi - Banshu-Ako section was electrified in 1961, and the rest of the line in 1969.

CTC signalling was commissioned between Higashi-Okayama and Banshu-Ako in 1983.

• Banshu-Ako Station: The Ako Railway operated a 13 km (8.1 mi) 762 mm (2 ft 6 in) gauge line to Une on the Sanyo Main Line between 1921 and 1951.
• Nishi-Katakami Station: The Dowa Mining Co. opened a 34 km (21 mi) line to Yanahara, to haul iron sulphide ore, between 1923 and 1931. The line is also connected to Wake station on the Sanyo Main Line. Passenger services commenced in 1931, freight services ceased in 1988 and the line closed in 1991.

Main line alternate routes

• Gotemba Line
• Kure Line
• Ube Line

This article incorporates material from the corresponding article in the Japanese Wikipedia.

• Miki, Masafumi (July 2004). "Railway Operators in Japan 13: Chugoku Region". Japan Railway & Transport Review (39): 36–43. Archived from the original on 2006-10-07. Retrieved 2007-02-26.