Hokuriku Railroad Ishikawa Line

The line grew out of the timber, charcoal and tobacco trade of the Hakusan district, whose freight prospects encouraged a group of eight promoters led by Hisao Kio to apply in 1912 for an electric railway from the Rokutobayashi area of Kanazawa to the town of Tsurugi. A licence was granted on 22 April 1913 for a 1,067 mm electric line. After the financial collapse of the Saiga interests forced a reorganisation, an Aichi-based contractor took a controlling stake and the Ishikawa Electric Railway company was formed in 1914. Recession and soaring material costs then forced the promoters to abandon both electrification and the broad gauge: the line opened on 22 June 1915 between Shin-Nonoichi (now Shin-Nishi-Kanazawa) and Tsurugi as a 762 mm gauge, steam-worked railway, and despite the company's name the firm was renamed Ishikawa Railway days later, on 30 June 1915.

The northern end towards central Kanazawa came from a separate concern. In 1916 the Kinno Tramway opened a horse-worked, 890 mm gauge line from Nomachi to Shin-Nonoichi (14 January) and on to the西金沢 terminus later called Shiragikuchō (30 August), while the Ishikawa Railway added its own Nonoichi connecting station in December. The tramway was renamed Kinno Railway in 1919 and absorbed by the Kanazawa Electric Railway in 1920. In a burst of modernisation the Ishikawa Railway regauged its Shin-Nonoichi–Tsurugi line to 1,067 mm and electrified it at 600 V DC on 1 August 1921; the following year the Kanazawa Electric Railway rebuilt the former Kinno line to the same standard and began through running, and on 1 May 1923 it absorbed the Ishikawa Railway outright.

The line was then extended beyond Tsurugi by yet another company. The Kinmei Railway opened a 1,067 mm steam line from Tsurugi to Jinjamae — later renamed Kaga-Ichinomiya, the station for the Shirayama-Hime Shrine — on 28 December 1927, transferred it to the Kanazawa Electric Railway in 1929, and saw it electrified that September. Through the 1920s and 1930s a string of intermediate stations opened along the route. Wartime consolidation of Japan's regional utilities and railways reshaped the corporate picture: in 1941 the Hokuriku Gōdō Electric company absorbed the Kanazawa Electric Railway, in 1942 it spun off its transport division as an earlier Hokuriku Railway, and on 13 October 1943 that company merged with the Kanaishi Electric Railway, Onsen Rail, Kinmei Railway, Noto Railway and others to form the present Hokuriku Railroad, of which the route became the Ishikawa Line.

At its greatest extent the line ran from Shiragikuchō, north of Nomachi, all the way to Kaga-Ichinomiya, and it interchanged through services with the Nōmi and Kinmei lines as the "Ishikawa General Line." That network then contracted from both ends. Passenger service on the Shiragikuchō–Nomachi section ceased in 1970 and the 0.8 km stub closed on 20 September 1972; freight on the whole line ended in 1976. The connecting Nōmi Line closed in 1980 and the Kinmei Line in 1987, after which on-board tickets dropped the "Ishikawa General Line" name and simply read "Ishikawa Line."

Modernisation continued on the surviving core. In 1990 the line re-equipped with air-conditioned 7000 series cars — former Tokyu 7000 series stock — and introduced one-man operation; automatic train stop equipment was commissioned in 2002. On 1 December 2006 the daytime semi-express service was abolished and all trains became all-stations locals. The line's outer end was then cut back: on 1 November 2009 the 2.1 km section between Tsurugi and Kaga-Ichinomiya was closed and replaced by an existing route bus, ending rail service to the shrine town. A new intermediate station, Hibari, opened in 2015, and station numbering was introduced in 2019.

Today the Ishikawa Line is a compact commuter and local railway linking southern Kanazawa, Nonoichi and Hakusan, worked by former Tokyu 7000 series and ex-Keiō 3000 series (7700 series) electric multiple units. Its trains were suspended only briefly after the 1 January 2024 Noto Peninsula earthquake. In November 2025 the line was renamed the "Hakusan Geopark Line" in reference to the Hakusan Tedorigawa UNESCO Global Geopark through which it runs, and from March 2026 it began running cars carrying a geopark headmark.

• 191322 April: a railway licence is granted to the Ishikawa Electric Railway for a 1,067 mm electric line from the Rokutobayashi area of Kanazawa to the town of Tsurugi.
• 191522 June: the line opens between Shin-Nonoichi (now Shin-Nishi-Kanazawa) and Tsurugi as a 762 mm gauge, steam-worked railway — not electrified despite the company's name; on 30 June the company is renamed Ishikawa Railway.
• 191614 January: the Kinno Tramway opens a horse-worked, 890 mm gauge line from Nomachi to Shin-Nonoichi, extended to the西金沢 (later Shiragikuchō) terminus on 30 August.
• 19211 August: the Ishikawa Railway regauges the Shin-Nonoichi–Tsurugi line to 1,067 mm and electrifies it at 600 V DC.
• 19221 October: the Kanazawa Electric Railway rebuilds the former Kinno line to 1,067 mm and electric and begins through operation with the Ishikawa Railway line.
• 19231 May: the Kanazawa Electric Railway absorbs the Ishikawa Railway.
• 192728 December: the Kinmei Railway opens a 1,067 mm steam line from Tsurugi to Jinjamae (renamed Kaga-Ichinomiya in 1937), the station for the Shirayama-Hime Shrine; it is transferred to the Kanazawa Electric Railway in 1929 and electrified that September.
• 194313 October: the earlier Hokuriku Railway merges with the Kanaishi Electric Railway, Onsen Rail, Kinmei Railway, Noto Railway and others to form the present Hokuriku Railroad; the route becomes its Ishikawa Line. (The Hokuriku Gōdō Electric company had absorbed the Kanazawa Electric Railway in 1941 and spun off the transport division in 1942.)
• 19701 April: passenger service on the Shiragikuchō–Nomachi section ends, leaving freight-only operation on that stub.
• 197220 September: the Shiragikuchō–Nomachi section closes entirely.
• 198729 April: the connecting Kinmei Line closes (the Nōmi Line had closed in 1980); thereafter on-board tickets drop the "Ishikawa General Line" name and read simply "Ishikawa Line."
• 199024 July: the line re-equips with air-conditioned 7000 series cars (former Tokyu 7000 series) and introduces one-man (driver-only) operation.
• 20061 December: the daytime semi-express service is abolished and all trains become all-stations locals.
• 20091 November: the 2.1 km section between Tsurugi and Kaga-Ichinomiya is closed and replaced by an existing route bus, ending rail service to the shrine town.
• 201514 March: a new intermediate station, Hibari, opens.
• 20254 November: the line is given the nickname "Hakusan Geopark Line," referencing the Hakusan Tedorigawa UNESCO Global Geopark through which it runs.