was the shortest railway tunnel in Japan, at 7.2 meters in length, until its abandonment in 2014. It was built in 1946, and was located on the

Agatsuma Line The is a local rail line in Gunma, Japan, and is part of the East Japan Railway Company (JR East) network. Approximately following the Agatsuma River, it is 55.6 km between and stations. Operations Although the official start of the line ...

Gunma Prefecture is a landlocked Prefectures of Japan, prefecture of Japan located in the Kantō region of Honshu. Gunma Prefecture has a population of 1,937,626 (1 October 2019) and has a geographic area of . Gunma Prefecture borders Niigata Prefecture and Fuk ...

br>at 36°33'50.2"N 138°43'21.2"E
The tunnel was abandoned after a nearby portion of the line was inundated by the construction of the

Yamba Dam is a dam in Naganohara, Agatsuma District, Gunma Prefecture, Japan. Construction began in 1967, with effective completion in October 2019 and the official opening on 1 April 2020. History Planning for the dam began in 1952, and it was planne ...

."Farewell to Japan’s shortest rail tunnel"

Nippon TV JOAX-DTV (channel 4), branded as (NTV) or Nippon TV, is a Japanese television station serving the Kantō region as the flagship station of the Nippon News Network and the Nippon Television Network System, owned and operated by the , a sub ...

, September 25, 2014 (video).

References

Railway tunnels in Japan Tunnels completed in 1946 Tunnels in Gunma Prefecture {{Japan-rail-transport-stub