Bessho Line

The line grew out of a tramway concession. In November 1919 a licence was granted to the Ueda Onsen Tramway to build between villages around Ueda, and in November 1920 the concession passed to the newly formed Ueda Onsen Electric Tramway. On 17 June 1921 that company opened two routes built to carry hot-spring visitors bound for the Bessho, Tazawa and Kutsukake spas: the Aoki Line from Miyoshichō (now Shiroshita) to Aoki, and the Kawanishi Line from Uedahara to Bessho (now Bessho-Onsen). Both were laid as light-railway tramways under the Tramway Act, and the first section opened on a 600 V DC overhead supply.

In August 1924 a bridge across the Chikuma River was completed and the Aoki Line was extended from Miyoshichō into the national railways' Ueda Station, joining the network to the trunk line and giving it a city-centre terminus. Through the late 1930s the company reorganised: the Uedahara–Aoki section was abandoned and the Ueda–Uedahara stretch absorbed into the Kawanishi Line, which in March 1939 was upgraded from a tramway to a full railway under the Local Railway Act and renamed the Bessho Line. That August the operator itself was renamed the Ueda Electric Railway, the first company to carry that name.

In October 1943 the Ueda Electric Railway merged with the Maruko Railway, a neighbouring operator founded in 1916, to form the Ueda-Maruko Electric Railway. At its height this combined enterprise ran a network of four lines totalling 48.0 kilometres across Ueda and the surrounding Chiisagata district — the Bessho Line together with the Nishimaruko, Maruko and Sanada-Sōkae lines. The line voltage was raised from 600 V to 750 V in 1953. Over the following decades, however, the network steadily contracted as ridership fell: the remaining Aoki Line trackage was abandoned in 1956, and the company's other branches were closed one by one, leaving the Bessho Line as the last line standing.

The corporate identity changed again as the surviving business was restructured. In May 1969 the company was renamed Ueda Kōtsū ("Ueda Transport"), reflecting its broadening into buses and other interests; freight service on the Bessho Line ended in 1984. On 1 October 1986 the line was raised to 1,500 V DC, a modernisation that brought in newer second-hand electric cars and retired the entire older fleet, including the celebrated round-window cars. The Ueda Station terminus was rebuilt on an elevated structure with its own Bessho Line ticket gate in 1998.

In 2005 the railway business was hived off into a new dedicated company, again called Ueda Electric Railway, which took over operation of the line on 3 October 2005; one-man (wanman) driver-only operation began the same day. Ueda Kōtsū, the surviving holding company, came to concentrate on bus and leisure operations and is itself owned by the Tokyu Corporation, the source of much of the line's later second-hand rolling stock. In 2009 the group sold its Joden Bus and Joden Taxi affiliates, and on 1 April 2016 station numbering, BE01 to BE15, was introduced along the line.

The line's most severe modern test came on 13 October 2019, when the floodwaters of Typhoon Hagibis (the 2019 East Japan Typhoon, Typhoon No. 19) tore away part of the left-bank levee of the Chikuma River near Suwagata in Ueda and collapsed the Chikuma River bridge on the Shiroshita side, severing the line just outside its city terminus. Limited service was restored in stages on the unaffected inner sections with bus substitution across the gap, but the bridge itself required full reconstruction. The city of Ueda took the collapsed structure into public ownership to fund the rebuild, and on 28 March 2021 the Bessho Line reopened across its full length, with fares waived for the day; the line marked the centenary of its 1921 opening that June.

• 191910 November: a tramway licence is granted to the Ueda Onsen Tramway for lines between villages around Ueda.
• 192019 November: the tramway concession is transferred to the newly formed Ueda Onsen Electric Tramway (Ueda Onsen Dengki).
• 192117 June: the Ueda Onsen Electric Tramway opens the Aoki Line (Miyoshichō, now Shiroshita, to Aoki) and the Kawanishi Line (Uedahara to Bessho, now Bessho-Onsen) as tramways for hot-spring traffic, on a 600 V DC supply.
• 192415 August: a bridge over the Chikuma River is completed and the Aoki Line is extended into the national railways' Ueda Station, completing through-running.
• 193919 March: the Kawanishi Line is upgraded from a tramway to a railway under the Local Railway Act and renamed the Bessho Line; on 30 August the operator is renamed the Ueda Electric Railway (first company of that name).
• 194321 October: the Ueda Electric Railway merges with the Maruko Railway (founded 1916) to form the Ueda-Maruko Electric Railway, whose network then totals four lines and 48.0 km.
• 1953September: the line voltage is raised from 600 V to 750 V.
• 195625 July: the Uedahara–Aoki section of the Aoki Line is abandoned and the Miyoshichō–Uedahara section singled, part of the long contraction that leaves the Bessho Line the network's sole survivor.
• 196931 May: the company is renamed Ueda Kōtsū ("Ueda Transport").
• 19841 November: freight service on the line is discontinued.
• 19861 October: the line is raised to 1,500 V DC; new second-hand cars enter service and the entire older fleet, including the round-window cars, is retired.
• 199829 March: Ueda Station is rebuilt on an elevated structure with a dedicated Bessho Line ticket gate.
• 20053 October: operation of the line passes from Ueda Kōtsū to a new dedicated company, again named Ueda Electric Railway; one-man (wanman) driver-only operation begins the same day.
• 20161 April: station numbering, BE01 to BE15, is introduced along the line.
• 201913 October: floodwaters from Typhoon Hagibis (the 2019 East Japan Typhoon) erode the Chikuma River's left-bank levee near Suwagata and collapse the Chikuma River bridge on the Shiroshita side, severing the line; service is restored in stages on inner sections with bus substitution across the gap.
• 202128 March: the Bessho Line reopens across its full length after the bridge is rebuilt, with fares waived for the day; the line marks the centenary of its 1921 opening that June.