Tobu Koizumi Line

The Tōbu Koizumi Line (東武小泉線, Tōbu Koizumi-sen^?), operated by the private railway operator Tobu Railway, connects Tatebayashi Station located in Tatebayashi, Gunma to Nishi-Koizumi Station located in Ōizumi, Gunma as well as Higashi-Koizumi Station in Ōizumi town to Ōta Station in Ōta, Gunma Japan.

The first section of the line from Tatebayashi Station to Koizumimachi Station was opened for passenger service on March 12, 1917, operated by the Chūgen Railway, which was purchased by Tobu Railway company in 1937.

The 3 km Sengokugashi Freight Line (仙石河岸貨物線^?) from Koizumimachi Station to Sengokugashi Station (仙石河岸駅^?) opened on April 13, 1939, as a freight-only branch line. Passenger services as far as Nishi-Koizumi commenced in 1941.

In 1941, Higashi-Koizumi Station to Ōta Station section opened on June 1, 1941, to service the Nakajima Aircraft Company Ōta and Koizumi plants. The lines were electrified in 1943.

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