Mine Line

Mine Line
KiHa 120 running through the line in 2012
Overview
Native name美祢線
LocaleYamaguchi Prefecture
Termini
Stations12
Service
Operator(s)Logo of the West Railway Company (JR West) JR West
Rolling stockKiHa 120
History
Opened13 September 1905; 120 years ago (1905-09-13)
Last extension23 March 1924; 101 years ago (1924-03-23)
Technical
Line length46.0 km (28.6 mi)
Number of tracksSingle-track
Track gauge1,067 mm (3 ft 6 in)
ElectrificationNone
Operating speed85 km/h (53 mph)
Route map

San'yō Shinkansen
0.0
Asa
2.0
Kamonosho Signal Station
4.2
Yunotō
6.6
Matsugase Signal Station
-1997
Asa River
10.2
Atsu
13.2
Shirōgahara
Shirōgahara Tunnel
140 m (460 ft)
Minami-Ōmine
Ōmine
-1997
19.4
Mine
UBE Corporation only
20.8
Kamiriyō
-1920
22.3
Shigeyasu
27.2
Ofuku
37.1
Shibuki
41.0
Nagato-Yumoto
43.3
Itamochi
Otobu River
Nagato Depot [ja]
San'in Main Line
46.0
Nagatoshi
San'in Main Line
San'in Main Line - Senzaki Branch Line

The Mine Line (美祢線, Mine-sen) is a rural railway line owned and operated by the West Japan Railway Company (JR West). It connects Asa Station in San'yō-Onoda to Nagatoshi Station in Nagato, both in Yamaguchi Prefecture, Japan.

The 46.0 km (28.6 mi) line operates north-south connecting the San'in Main Line with the San'yō Main Line and San'yō Shinkansen. No other railway lines are crossed by the Mine Line.

Conversion to BRT

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On August 7, 2025, JR West, Yamaguchi Prefecture, Mine City, Sanyo Onoda City, and Nagato City agreed to abandon restoration of the railway line and convert the Mine Line to Bus Rapid Transit (BRT).[1]

The only proposed section of BRT-only roadway on the line is a 4.2 km (2.6 mi) section between Yuno Pass and Koho. Reasons given for not having more BRT-only sections are that many existing roads are parallel to the railway line and traffic congestion in the area is not an issue so "express delivery and punctuality can be ensured".[1]

History

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The Sanyo Railway Company opened the Asa to Minami-Omine section in 1905 to haul coal. The company was nationalised in 1906, and the Japanese Government Railway (JGR) extended the line to Mine in 1909. The Mine Light Railway Company opened the Mine to Shigeyasu section in 1916. That company was nationalised in 1920, and the JGR opened the section to Ofuku the same year. The line was extended to Nagato in 1924, completing the line.[2] Freight services ceased in 1984, except for limestone haulage from Shigeyasu, which ceased in 2009.[3]

All services were suspended after heavy rainstorm flooding in July 2010.[4][2] Despite estimates that repairs would take up to three years to complete, the Mine Line was restored to full service on 26 September 2011, in time for the 66th National Sports Festival, "Oidemase Yamaguchi Kokutai," which began in October 2011.

Since June 2023, the Mine Line has been fully suspended due to major infrastructure damage including the collapse of the 6th Atsusa River Bridge, caused by record-breaking heavy rain on June 30 and July 1, 2023. Alternative transportation has been provided by bus.[5][6][1]

In May 2024, JR West announced that restoration of the line as well as future operation would be very difficult without the financial support of prefectural and local governments along the line, and that daily usage of more than 2,000 passengers was required to effectively restore and operate the line. Local governments claimed that an estimated daily usage of 1,292 could be achieved, but daily usage in 2022 was only 377 with the line incurring a deficit of 470 million yen over the previous three years.[6]

In December 2024, JR West proposed conversion of the Mine Line to Bus Rapid Transit (BRT).[7]

In May 2025, JR West announces that its preferred option for restoration of the Mine Line is conversion to BRT. Mine City still prefers restoration of the line as a railway.[8]

On August 7, 2025, JR West, Yamaguchi Prefecture, Mine City, Sanyo Onoda City, and Nagato City agreed to abandon restoration of the railway line and to convert the Mine Line to BRT.[1]

Stations

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All stations are in Yamaguchi Prefecture.

Name Distance (km) Connections Location
Asa 厚狭 0.0 Sanyō Shinkansen, Sanyō Main Line San'yō-Onoda
Kamonoshō S.B. 鴨ノ庄信号 (2.0)  
Yunotō 湯ノ峠 4.2  
Atsu 厚保 10.2   Mine
Shirōgahara 四郎ヶ原 13.2  
Minami-Ōmine 南大嶺 16.9  
Mine 美祢 19.4  
Shigeyasu 重安 22.3  
Ofuku 於福 27.2  
Shibuki 渋木 37.1   Nagato
Nagato-Yumoto 長門湯本 41.0  
Itamochi 板持 43.3  
Nagatoshi 長門市 46.0 San'in Main Line

See also

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References

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  1. ^ a b c d "【JR西日本】美祢線のBRT復旧を自治体が認めた理由 – 鉄道廃止に至った経緯". 鉄道協議会日誌 (in Japanese). 7 August 2025. Retrieved 22 October 2025.
  2. ^ a b 日本放送協会 (24 June 2024). "山口 JR美祢線 地域の鉄道守れるか?豪雨被害で約1年運休 復旧の鍵は乗客の増加か | NHK". NHK山口放送局 (in Japanese). Archived from the original on 24 June 2024. Retrieved 24 May 2025.
  3. ^ "山口、石灰石列車がラストラン/半世紀の歴史に幕". 四国新聞社. Retrieved 24 May 2025.
  4. ^ "「美祢線の復旧、1年以上かかる」 山口豪雨でJR広島支社長 - MSN産経ニュース". sankei.jp.msn.com (in Japanese). 29 July 2010. Archived from the original on 3 August 2010. Retrieved 22 October 2025.
  5. ^ "2024 – Japan – "Last Train To Nagato-Shi"". Trains To Beyond. 13 June 2024. Retrieved 1 October 2024.
  6. ^ a b 日本放送協会. "山口 JR美祢線 地域の鉄道守れるか?豪雨被害で約1年運休 復旧の鍵は乗客の増加か | NHK". NHK山口放送局 (in Japanese). Archived from the original on 24 June 2024. Retrieved 22 October 2025.
  7. ^ 日本テレビ. "運休続くJR美祢線…JRはバスによる高速輸送システム=BRTの復旧も提案(2024年12月19日掲載)|KRY NEWS NNN". 日テレNEWS NNN (in Japanese). Retrieved 23 October 2025.
  8. ^ 日本テレビ. "JR西日本「美祢線はBRT(バス高速輸送システム)での復旧が最もふさわしい」 JR美祢線利用促進協議会の総会で(2025年5月22日掲載)|KRY NEWS NNN". 日テレNEWS NNN (in Japanese). Retrieved 23 October 2025.
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