Ômura-sen Nagasaki-sen 　　　　大村線　長崎線

The Ômura-sen runs along the eastern coast of Ômura Bay, which is almost completely enclosed, in the west by Nishi Sonogi Peninsula and in the south by Nagasaki Peninsula. Only a small opening in the north between a group of islands in the Sasebo region gives passage to ships into Ômura Bay. At the southern end of the Ômura-sen at Isahaya most trains turn sharply to the west into Nagasaki Peninsula to reach Nagasaki either directly via the Nagasaki Honsen and the new tunnels opened in 1972, or on the old line across the mountains via Nagayo, opened in 1897/8. This old line is often referred to as the Nagasaki-sen (in contrast to the Nagasaki Honsen).

The Ômura-sen from Haiki in the north to Isahaya in the south (built 1898) once formed a section of the main line from the city of Fukuoka (Hakata station) to Nagasaki, until trains started running along Ariake Bay to Nagasaki in 1934. The line is 47, 6 km long; since 1992 the section from Haiki to the theme park Huis Ten Bosch (pronounced haus-ten-boss and recreating the Netherlands) is electrified (20 kV/60 Hz) for through express trains from Hakata via the Sasebo-sen.

Most Ômura-sen trains today continue from Haiki northwards to the town of Sasebo.

Whereas fast Ômura-sen services (called "Seaside Liner") between Nagasaki and Isahaya go straight through the long tunnels connecting the two towns (via Hizen Koga and Utsutsugawa), stopping trains leave (or join) the main line at Kikitsu (6, 5 km from Isahaya) to serve the local villages along the original Nagasaki-sen (23, 5 km long). These trains branch off from (or regain) the Nagasaki Honsen at Urakami, 1, 6 km north of Nagasaki.

The Ômura-sen has a service roughly every half hour, on an alternating basis with one Seaside Liner and one stopping train. Between Isahaya and Nagasaki via Nagayo there is a through train roughly every hour, with additional services between Nagayo and Nagasaki.

#The situation in 2025: With the opening of the new Shinkansen to Nagasaki on September 23, 2022, SHIN ÔMURA - a changeover station from Shinkansen to Ômura-sen or vice versa - went into service. Express and local trains, worked by the new YC1 diesel hybrid cars, have now taken over, trains from Sasebo basically running via the de-electrified 1067mm gauge line via Utsutsugawa to Nagasaki, while trains from intermediate stations mostly run via the Nagayo Line (Nagasaki-sen).

Kikitsu喜々津 Higashisono東園 Ôkusa大草 Hon Kawachi本川内 Nagayo長与 Kôda高 Michino-o道ノ尾 Nishi Urakami西浦上 Urakami浦上 Nagasaki長崎

Haiki早岐 Huis Ten Bosch (Haustenbos)ハウステンボス Haenosaki 南風崎 Ogushigô小串郷 Kawatana川棚 Sonogi彼杵 Chiwata千綿 Matsubara松原 Ômura Sharyô Kichi大村車両基地 Takematsu竹松 SHIN ÔMURA新大村 Suwa諏訪 Ômura大村 Iwamatsu岩松 Isahaya諫早

Ômura-sen Nagasaki-sen 　　　　大村線　長崎線

4834 Ômura-sen -- running along Ômura Bay, between Sonogi and Chiwata. The train is class 66/67 no. 11. (2018)

5070 Nagasaki-sen -- climbing up from Ôgusa and Ômura Bay towards the summit tunnel leading across to Nagasaki. (2018) Further pictures of this line see Nagasaki-sen (original line) Isahaya-Nagayo-Nagasaki.

0321 A full view of Huis ten Bosch, with train set CM 25 in the station. The set consists of end car kuroha782-503, moha783-307, moha783-211, and the driving control car kuha783-109, which ran as an intermediate car until the Sasebo portion went off at Haiki. (2013)

0335 Huis ten Bosch, diesel car set kiha66 15/kiha67 15 has arrived from Nagasaki and will continue to Haiki and Sasebo. On the right the electric set to Hakata can be seen. It will join the intercity train portion from Sasebo at Haiki, 4, 7 km to the north. (2013)

4752 View towards Huis Ten Bosch from train class 66/67 no.14. (2013)

4762 Trains crossing at Haenosaki, south of Huis ten Bosch. The two 2-car sets headed for Sasebo are class 66/67 no. 15 and no. 8. (2018)

4782 After Ogushigô in the direction of Kawatana. (2018)

4785 Between Ogushigô and Kawatana near the northern end of Ômura Bay. (2018)

4790 Nearing Kawatana. (2018)

4871 Near Matsubara in the centre part of Ômura Bay. (2018)

4893 Crossing train set kiha66/67 7 at Takematsu. (2018)

4944 Between Iwamatsu and Isahaya construction of the new Nagasaki Shinkansen is well underway. Seen from the Ômura-sen. (2018)

4946 Between Iwamatsu and Isahaya at the southern end of the line: construction of the Nagasaki Shinkansen. The Nagasaki Shinkansen line reaches Ômura Bay from Takeo Onsen in the region of Matsubara. (2018)

5278 Ômura Nagasaki line trains at Nagasaki terminus. On right the newer train kiha220 1101 + kiha220 209 is waiting at platform 0, on the left the 12 o'clock Seaside Liner to Sasebo (kiha66/67 13) via Utsutsugawa is just leaving. (2018)

0386 The new diesel-electric hybrid train set YC 1-206 waiting to leave the new Nagasaki terminal as a local train via Nagayo (Nagasaki-sen) to Takematsu on the Ômura-sen. Seen from the rear. (2023)

0028 Between Ogushigô and Kawatana. Rain clouds in the humid and hot weather cover the Ômura Bay. (2013)

0020 Crossing set kiha66/67 no.1 at Kawatana. This diesel car set is painted in the old livery of former National Railways express diesel trains. (2013)

0013 Seaside Liner, composed of the two diesel cars KIHA 66 14 and KIHA 67 14 at Kawatana. (2013) -> The last class 66/67 sets were withdrawn by June 30, 2021; they have been replaced by YC1 diesel hybrid sets.

0998 Ômura Bay, near Chiwata. (2013)

0995 Chiwata halt. (2013)

0986 In a class 66/67 train near Matsubara, north of Ômura. (2013)

0964 On a humid summer's day with the rice paddies in deep green. Near Iwamatsu. (2013)

img445 From the train. In the region of Iwamatsu just south of Ômura on March 17, 1981.

0961 The new Nagasaki Shinkansen already under construction, seen from an Ômura-sen train. (2013)