Nagasaki Main Line
Kiha 47, which became the mainstay of the non-electrified section of the Nagasaki Main Line (Kōhoku Station on September 24, 2022)
Overview
Owner	JR Kyushu
Locale	Saga,Nagasaki prefectures
Termini	Tosu Nagasaki
Stations	41
Service
Type	Heavy rail
Operator(s)	JR Kyushu,JR Freight
History
Opened	1891
Technical
Line length	148.8 km (92.5 mi)
Track gauge	1,067 mm (3 ft 6 in)
Electrification	20 kV AC, 60 HzOverhead catenary (Tosu-Hizen-Hama)
Route map

Nagasaki Main Line route
Legend
↑Kagoshima Main Line for Hakata 0.0 Tosu 17 m → Kagoshima Main Line for Kurume Route 34 2.0 Shin-Tosu 2.4 Asahi River 52 m 4.2 Hizen-Fumoto 28 m 8.2 Kansui River 59 m 8.5 Nakabaru 30 m old Metabaru Station until 1943 10.0 Kiridōshi River 30 m 13.1 Yoshinogari-kōen 11 m 14.3 Tade River 66 m 15.7 Kanzaki 9 m 16.4 Jōbaru River 117 m 17.4 Ane River No. 1 51 m 19.3 Ane River No. 2 38 m 20.2 Igaya 5 m 21.0 22.0 Route 34 → old Saga Line 25.0 Saga → old Saga Station until 1976 26.3 27.7 Uekari River 119 m 28.0 Nabeshima 5 m 28.3 Shin River 61 m 29.0 Higashi-Ō River 147 m 29.8 Balloon Saga temporary 30.0 Kase River 503 m 30.3 Moat 123 m 30.4 Moat 61 m 31.4 Kubota 5 m ←Karatsu Line for Karatsu 32.5 33.8 Moat 35 m 35.0 Ushizu River 159 m Route 34 39.6 Kōhoku 5 m Route 34 ←Sasebo Line for Sasebo 42.5 Rokkaku River 152 m 44.7 Hizen-Shiroishi 4 m 48.8 49.9 Hizen-Ryūō 4 m Route 207 52.2 Shiota River 241 m 54.6 Hizen-Kashima 7 m 55.4 57.6 Hizen-Hama 6 m 58.0 61.0 Nishiura Tunnel 180 m 61.5 Hizen-Nanaura 6 m 61.9 Tunnel 90 m 63.6 Hizen-Iida 8 m 63.8 65.6 67.7 Tara 7 m 69.7 Kamezaki Tunnel 175 m 70.7 Tunnel 175 m 71.7 Sato Tunnel 173 m 72.7 Sato Signal Station 9 m Route 207 75.6 Hizen-Ōura 17 m 76.9 Route 207 254 m Saga ↔Nagasaki 78.9 Doizaki Signal Station 11 m 81.6 Tunnel 215 m Route 207 82.3 Konagai 7 m 82.7 Route 207 219 m 84.4 Tunnel 140 m 84.7 Nagasato 6 m 84.9 Nagasato River 81 m 87.3 Sakai River 65 m 87.6 Yue 14 m 90.9 Oe 10 m 91.6 Shinkai Tunnel 210 m 92.0 Shinkai River 91 m 95.6 Hizen-Nagata 5 m 95.9 Nishinagata River 51 m 97.5 old Higashi-Isahaya Station until 1990 97.8 Higashi-Isahaya 8 m 98.8 Honmyō Tunnel 390 m 99.5 Honmyō River 66 m ←Ōmura Line for Haiki 100.4 Isahaya 16 m 100.6 Route 207 93 m →Shimabara Railway Line for Kazusa 100.8 Tunnel ↓ 52 m 100.9 Route 207 ↑ 183 m / ↓ 337 m 101.4 Isahaya Tunnel No.2 ↓ 138 m Route 34 103.2 Nishi-Isahaya 6 m 103.4 Higashi-Ō River 128 m 105.2 105.8 Hisa Mountain Tunnel 56 m 106.9 Kikitsu 3 m 107.2 ← Old Line via Nagayo 107.5 Tunnel 765 m 108.7 Kajiki Tunnel 374 m 109.4 Ichinuno 28 m 110.0 Tunnel 1249 m 3.5 ←Higashi-Sono 7 m 111.4 Koga Tunnel 558 m 112.1 112.3 Hizen-Koga 45 m 112.6 112.8 Enoki Tunnel 1515 m 7.2 ←Ōkusa 7 m 114.8 Utsutsugawa 67 m 115.1 Nagasaki Tunnel 6173 m 10.5 118.5 Hizenmigawa Signal Station 30 m 12.3 ←Honkawachi 69 m 15.4 ←Nagayo 15 m 16.4 ←Kōda 21 m 18.9 ←Michinō 52 m 20.6 ←Nishi-Urakami :Sumijoshi → 23 m ↔Nagasaki Tramway 122.2 Ō River 79 m 123.7 Urakami 3 m →Urakami-eki-mae 125.3 Nagasaki 3 m 131.3 →Nagasaki-eki-mae
Sources:[1]

TheNagasaki Main Line (長崎本線,Nagasaki-honsen), or simply known as theNagasaki Line, is a railway line owned by theKyushu Railway Company (JR Kyushu) connectingTosu Station inSaga Prefecture toNagasaki Station inNagasaki Prefecture, Japan. There is a separate branch of this line fromKikitsu Station toUrakami Station by way of the Nagasaki Tunnel, rather than viaNagayo Station, avoiding a long detour.^[2]

• Operators and route length:
  • JR Kyushu (services and tracks)
    • Tosu - Nagasaki: 125.3 km (77.9 mi)
    • Kikitsu - Nagayo - Urakami: 23.5 km (14.6 mi)
  • JR Freight (services)
    • Tosu - Nagasaki: 125.3 km (77.9 mi)
• Stations: 41 (including seasonal stations)
• Double-tracking:
  • Tosu - Kōhoku
  • Isahaya - Kikitsu
  • Urakami - Nagasaki
• Electrification: Tosu - Hizen-Hama (20kV AC 60 Hz)
• Railway signalling: Automatic
• CTC center: Hakata Integrated Operations Center

The line is single-tracked between Kōhoku and Isahaya stations due to the coastal geography of the area making double-tracking prohibitively expensive. The "old route" (旧線) is the branch of the Nagasaki Main Line betweenKikitsu andUrakami viaNagayo that existed before the opening of the new route. Prior to the opening of the new route, express and limited express trains ran on this section. Vestiges of this can be seen atMichinoo and other stations along the route. The "new line" (新線) is the branch of the Nagasaki Main Line betweenIsahaya andUrakami viaIchinuno through the Nagasaki Tunnel. The line was electrified in 1976, however due to the lack of freight trains running beyond Nabeshima and low population along the line, the section between Hizen-Hama and Nagasaki was de-electrified after the opening of the Nishi Kyushu Shinkansen.

As of 23 September 2022, theRelay Kamome limited express operates on the Nagasaki Main Line untilKōhoku before splitting off toTakeo-Onsen where passengers can board theNishi Kyushu Shinkansen to Nagasaki. The mergedMidori/Huis Ten Bosch limited express operates east ofKōhoku Station with some services operating additionally as a Relay Kamome until Takeo-Onsen. Prior to the opening of the new Shinkansen line, limited express trains travelled over the new route betweenIsahaya andUrakami stations. Limited Express Relay Kamome trains are operated by JR Kyushu using the 6-car 885 series and 8-car787 series.^[3] A new limited express serviceKasasagi was introduced between Hizen-Kashima and Hakata with through services to Mojiko to make up for the loss of the Kamome along the line using the 6-car 885 series, 8-car 787 series, and 8-car 783 series EMU's.^[4]

Overnightsleeper trains, such as theSakura (between Tokyo and Nagasaki) andAkatsuki (between Kyoto and Nagasaki), were discontinued in 2008.

Other than trains that are operated on the entire Nagasaki Line, there are trains which operate in specific sections, such as from Tosu toHizen-Kashima, and trains which continue on to other lines. From of 23 September, all electric trains are slated to be replaced by DMUs and hybrid diesel-electric trains between Hizen-Hama and Nagasaki.

• In the morning, fromHizen-Nanaura Station, there is a direct train toMojikō Station (on theKagoshima Main Line).
• The new line from Isahaya to Nagasaki usesEMUs, but the old line, including direct trains to theOmura Line, usesDMUs. However, the rapid service trainSeaside Liner, despite being a DMU, uses the new line.
• Between Hizen-Nanaura Station andYue Station, because it is a relatively inactive part of the line, local trains only run for about five hours into the daytime after the morning rush.
• WanmanDriver-only operation trains are operated on the entire Nagasaki Line. On the new line, the817 series EMU is used, and on the old line, the KiHa 66, 67, and 200 DMUs are used.

Freight trains are operated between Tosu andNabeshima. High-speed freight trains make three round trips a day from Tosu Freight Terminal to Nabeshima. Theelectric locomotive used is theClass ED76. Freight trains only arrive and depart from Nabeshima station.

Legend

• All trains stop at stations marked "●", some stop at stations marked "▲". All trains pass stations marked "｜".
• Double-tracked sections are marked "∥", single-tracked sections where trains may pass are marked "◇", and single-tracked sections where trains cannot pass are marked "｜".
  "^" and "∨" indicate a boundary between single- and double-track sections.

• "Rapid" refers to theSeaside Liner rapid service.
• Local trains make all stops. For information on theRelay Kamome,Midori andHuis Ten Bosch limited express services consult their respective articles.

• All stations located within Nagasaki Prefecture.
• All trains make all stops.

• 885 series (Relay Kamome, Kasasagi,Midori)
• 783 series (Midori,Huis ten Bosch)
• 787 series (Relay Kamome,Midori)
• 811 series (Between Tosu and Hizen-Ōura)
• 813 series (Between Tosu and Hizen-Ōura)
• 817 series
• 415 series
• Kiha 47
• KiHa 66/67 DMUs (Seaside Liner)
• KiHa 200 DMUs (Seaside Liner)
• YC1 series

TheKyushu Railway Co. opened the Tosu - Saga section in 1891, extending it to Nagasaki via Haiki in 1898.

In 1907, theRailway Nationalization Act was passed inJapan,nationalising all major railways. The Hizen-Yamaguchi - Isahaya direct line was opened in 1934, with the Hizen-Yamaguchi - Haiki section being renamed theSasebo Line and the Haiki - Isahaya section theOmura Line.

The Saga - Nabeshima section was the first to be duplicated in 1966, and by 1969 the Tosu - Hizen-Yamaguchi and Isahaya - Kikitsu sections were duplicated. The Urakami-Nagasaki section was duplicated in 1990.

The 6173m Shin-Nagasaki tunnel and associated Kititsu - Urakami deviation opened in 1972, and the entire line was electrified in 1976. Freight services beyond Nabeshima ceased in 1999.

• Saga station - The 24 km line to Setaka (on theKagoshima Main Line) opened 1931-35, and closed in 1987. This line crossed three major watercourses by substantial bridges.

In January 2022, it was announced that the Nagasaki Main Line would be split into two sections and upper and lower management separation is to be introduced. JR Kyushu will continue to operate trains in the two section as a Type 2 Railway Business while the infrastructure of the 60.8 km (37.8 mi) section betweenHizen-Yamaguchi Station andIsahaya Station is to be maintained by Saga-Nagasaki Railway Management Centre as aType 3 Railway Business.^[5] JR Kyushu is to maintain train operations in this section for the next 23 years after the opening of the Nishi Kyushu Shinkansen.

On 10 June 2022, JR Kyushu announced further details regarding the section between Hizen-Yamaguchi station and Isahaya Station. The section betweenHizen-Hama Station and Nagasaki Station is to be de-electrified with diesel trains replacing all electric trains running in this section. Hizen-Yamaguchi Station is to be renamed to Kohoku Station (江北). To make up for the loss of express trains running in this section, a new express train "Kasasagi" is to operate between Hizen-Kashima Station and Saga Station with services going onwards to Hakata Station. As de-electrification means thejoyful train "36 plus 3" will no longer be able to reach Nagasaki Station, a new diesel joyful train "Futatsuboshi 4047" is to operate along the Nagasaki Main Line during the morning run and Omura Line in the afternoon return run.^[6]

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

• Nagasaki Main Line
• Lines of Kyushu Railway Company
• Railway lines opened in 1891
• 1067 mm gauge railways in Japan

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