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Kaizuka Line
Kaizuka Line 600 series train
Overview
Owner	Nishi-Nippon Railroad (Nishitetsu)
Line number	NK
Termini	Kaizuka Nishitetsu Shingū
Stations	10
Service
Depot(s)	Tatara
History
Opened	23 May 1927 (1927-05-23)
Technical
Line length	11.0 km (6.8 mi)
Track gauge	1,067 mm (3 ft 6 in)
Electrification	1,500 V DC

Route map
Legend
Fukuoka City SubwayHakozaki Line Kagoshima Main Line 0.0 Kaizuka Old Tatara Station 1.4 Najima 2.5 Chihaya Nishitetsu Chihaya 3.0 Kashii-Miyamae 3.6 Nishitetsu Kashii Kashii Line Kashii 5.0 Kashii-Kaenmae 6.1 Tōnoharu 7.2 Wajiro Kashii Line 9.0 Mitoma 11.0 Nishitetsu Shingū ↓Closed in 2007 13.0 Koga-Golfjomae 14.2 Nishitetsu-Koga Koga 15.6 Hanami Fukuma 18.2 Nishitetsu-Fukuma 19.6 Miyajidake (1) -1951 Miyajidake Eik-mae 19.5 Miyajidake (2) 1951- 20.9 Tsuyazaki

TheKaizuka Line (貝塚線,Kaizuka-sen) is an 11.0 km (6.8 mi) Japanese railway line inFukuoka prefecture, run by the private railway operatorNishi-Nippon Railroad (Nishitetsu). It linksKaizuka Station inHigashi-ku, Fukuoka withNishitetsu Shingū Station inShingū. It connects to theKashii Line ofJR Kyushu atWajiro, and theHakozaki Line ofFukuoka City Subway at Kaizuka.

The line was 20.9 km (13.0 mi) long until Nishitetsu closed the 9.9 km section between Nishitetsu Shingū andTsuyazaki stations on April 1, 2007.^[1] Until then, the line was calledMiyajidake Line (宮地岳線,Miyajidake-sen).

The Kaizuka Line is the most congested railway line in Japan outside the Tokyo Metropolitan area. In Fiscal Year 2022 the congestion rate between Najima and Kaizuka stations was 154% during the morning peak, making it the 2nd most congested railway line in Japan.^[2] In Fiscal Year 2023 the congestion rate was 158%,^[3] which was equal 5th most congested and the only line outside the Tokyo Metropolitan Area in the list of top 10 most congested railway lines.

All services on the Kaizuka Line are Local trains, stopping at all stations.

As of January 2024^[update], services operate every 10 minutes during weekday morning & afternoon peaks, and every 15 minutes at other times.^[4]

2-carNishitetsu 600 Series [ja]electric multiple unit trains.

The Hakata Bay Railway opened the1,435 mm (4 ft 8+1⁄2 in) gauge Shinhakata to Wajiro line in 1924, and extended the line to Miyajidake the following year. The line was electrified at 1,500 V DC in 1929. The company merged with the Nishi-Nippon Railway in 1942. The 1 km section from Miyajidake to Tsuyazaki opened in 1951, and in 1954 the line was re-gauged to1,067 mm (3 ft 6 in) and connected to the Fukuoka line.^{[citation needed]}

The line was grade separated over the JRKashii Line at Wajiro Station in 1966, and CTC signalling was commissioned in 1978.^{[citation needed]}

In 1986, the Shinhakata to Kaizuka section was closed and replaced by the Fukuoka City SubwayHakozaki Line.

In 2007, the 10 km Nishitetsu Shingū to Tsuyazaki section closed due to declining patronage.

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

• Nishi-Nippon Railroad
• Kaizuka Line
• Railway lines in Japan
• Rail transport in Fukuoka Prefecture
• 1067 mm gauge railways in Japan

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