Kominato Line

The railway grew out of a Meiji-era plan to drive a line across the Bōsō Peninsula to the Pacific (Sotobō) side at the town of Kominato — now part of Kamogawa City — a place famous as the birthplace of the Buddhist monk Nichiren; the name "Kominato" comes from that intended, never-reached destination. The company received its railway licence in 1913 for a line from Goi to the Kominato area. After incorporating in 1917, it struggled to raise construction funds and turned to the financier Yasuda Zenjirō, who agreed to back the unpromising rural project with the resources of the Yasuda zaibatsu; by 1924 the zaibatsu's shareholding exceeded sixty per cent. With that capital the company bought two Baldwin steam locomotives from the United States in 1924 to prepare for operations.

The first section, from Goi to Satomi, opened on 7 March 1925. (The English Wikipedia article gives the date as 7 May 1925; the Japanese sources, citing the official gazette, give 7 March, which is used here.) The line was extended from Satomi to Tsukizaki on 1 September 1926, and reached its present eastern terminus at Kazusa-Nakano on 16 May 1928, at which point internal-combustion (diesel) traction came into use alongside steam. The company had intended to push on from Kazusa-Nakano toward Kominato, and some preparatory work near the planned Kominato terminus was begun in the late 1920s, but the extension was never built.

The plan to reach Kominato was ultimately abandoned. When it became clear that the government's Kihara Line — today the Isumi Railway's Isumi Line — would reach Kazusa-Nakano (which it did in 1934), there was no longer a case for Kominato Railway to build its own line across the peninsula, since a connection at Kazusa-Nakano already provided a route toward the Pacific coast. The unused licence for the Kazusa-Nakano-to-Awa-Kominato section was formally revoked in 1936.

During the Pacific War, in December 1942, Kominato Railway was brought into the Keisei corporate group, becoming a subsidiary of the Keisei Electric Railway, a relationship that continued after the war. The line modernised steadily in the postwar decades: the last steam locomotives were withdrawn on 21 March 1962 and the fleet standardised on diesel railcars, with the retired steam engines preserved on display at Goi Station. Freight service was wound down in stages, with freight on the Goi–Satomi section ceasing on 1 October 1969, completing the withdrawal of goods traffic from the line.

Through the later twentieth century the line settled into its role as a rural local railway, and from the late 1990s its ridership fell sharply. Automatic train stop (ATS) equipment was installed on the Goi–Kazusa-Ushiku section on 1 February 1995. The hilly southern end has repeatedly suffered weather damage: on 12 April 2006 heavy rain washed out part of the track between Kazusa-Nakano and Yōrōkeikoku, suspending services there for about two months, and similar typhoon and heavy-rain closures recurred in later years, including the widespread damage caused by Typhoon Faxai in September 2019, from which the whole line was not fully restored until January 2020.

In the twenty-first century the Kominato Line has increasingly leaned on its heritage character and tourism. From 15 November 2015 the company introduced the "Satoyama Torokko," an open-sided trolley train hauled by a diesel locomotive styled to resemble an Orenstein & Koppel steam engine once used on the line, running mainly at weekends to draw leisure visitors. The railway's old station buildings and structures were recommended for designation as National Registered Tangible Cultural Properties in November 2016, and in 2017 the line won a Good Design Award for its quaint stations; in 2018 "Kominato Railway and its surrounding landscape" was selected as one of Chiba Prefecture's cultural assets. The line continues to operate today, still using its vintage KiHa 200 diesel cars alongside more recently acquired KiHa 40 railcars.

• 191326 November: Kominato Railway is granted a railway licence for a line from the Goi area to Kominato (Minato), across the Bōsō Peninsula.
• 191731 May: the Kominato Railway company is founded; it later secures financing from Yasuda Zenjirō and the Yasuda zaibatsu.
• 1924The company buys two Baldwin steam locomotives from the United States in preparation for opening; by this year the Yasuda zaibatsu's shareholding exceeds 60%.
• 19257 March: the first section, Goi–Satomi, opens. (EN Wikipedia gives 7 May 1925; the JA gazette-cited date of 7 March is used per JA-deference.)
• 19261 September: the line is extended from Satomi to Tsukizaki.
• 192816 May: the line reaches its present eastern terminus at Kazusa-Nakano, completing it; diesel (internal-combustion) traction comes into use.
• 1934The government's Kihara Line (today the Isumi Railway's Isumi Line) reaches Kazusa-Nakano; plans to extend the Kominato Line on to Kominato are consequently abandoned.
• 193628 October: the railway licence for the unbuilt Kazusa-Nakano–Awa-Kominato section is revoked because construction was not completed by the deadline.
• 1942December: under wartime conditions, Kominato Railway becomes part of the Keisei group, a subsidiary of the Keisei Electric Railway.
• 196221 March: the last steam locomotives are retired and the fleet is standardised on diesel railcars; the withdrawn steam engines are preserved on display at Goi Station.
• 19691 October: freight operations on the Goi–Satomi section end, completing the withdrawal of freight from the line (Satomi–Kazusa-Nakano freight had ended in 1967).
• 19951 February: automatic train stop (ATS) equipment is installed on the Goi–Kazusa-Ushiku section.
• 200612 April: heavy rain washes out part of the track between Kazusa-Nakano and Yōrōkeikoku, suspending services there for about two months.
• 201515 November: the open-sided 'Satoyama Torokko' trolley train, hauled by a diesel locomotive styled after an Orenstein & Koppel steam engine, enters service (initially Kazusa-Ushiku–Yōrōkeikoku), running mainly at weekends.
• 20174 October: the line receives a Good Design Award for its quaint station buildings.
• 20199 September: Typhoon Faxai (the Bōsō Peninsula typhoon) suspends the whole line; full restoration is not achieved until 27 January 2020 after further heavy-rain damage that autumn.