On the 15th, a projection was announced indicating that an approximately 4-kilometer extension from the terminal station into the city would reach cumulative profitability within 40 years of opening. The total project cost is estimated at around 160 billion yen, with plans to open around 2040, and coordination with the national government and ward is progressing.
The plan involves extending northwest from Hikarigaoka Station and establishing three new stations: Toshida Station, Station, and Oizumi Gakuencho Station (all tentative names).
The areas around these three stations are considered “railway-deficient zones,” located more than 1 kilometer from the nearest station. In 2016, an extension was deemed “meaningful” in a recommendation. A project team was established in 2023 to continue examining issues such as profitability, generating passenger demand, and securing funding.
The projection estimates that the extension will increase daily passenger demand on the entire Oedo Line by approximately 60,000 people. Since the cost-benefit ratio, which indicates the effectiveness relative to the development cost, exceeds “1,” it meets the criteria for national approval. For the project cost, utilization of the “Subway Construction Cost Subsidy,” where the national and local governments provide financial support, is being considered.
Hikarigaoka Station
Hikarigaoka Station is a railway station located in Nerima Ward, Tokyo, Japan, primarily serving the Toei Oedo Line. It opened in 1991 as part of the development of the large Hikarigaoka residential area. The station and its surrounding neighborhood were built on the former grounds of the Nakajima Aircraft Company’s plant, which was a significant site for Japanese aviation during World War II.
Toshida Station
I am unable to find any information on a place or cultural site named “Toshida Station.” It is possible the name may be misspelled or refers to a very local or lesser-known location. If you meant the historic **Tōshō-gū Shrine** in Nikkō, Japan, it is a lavish 17th-century Shinto shrine dedicated to Tokugawa Ieyasu, the founder of the Tokugawa shogunate.
Oizumi Gakuencho Station
Oizumi Gakuencho Station is a railway station on the Tobu Koizumi Line in Ōta, Gunma Prefecture, Japan. It primarily serves the nearby educational institutions, including the Oizumi Gakuen College, which influenced its name. The station opened in 1931 to support the development of the surrounding school campus and community.
Oedo Line
The Oedo Line is a subway line in Tokyo operated by the Tokyo Metropolitan Bureau of Transportation. It is one of the world’s deepest subway lines and was constructed to alleviate traffic congestion, with its first section opening in 1991. The line forms a large loop around central Tokyo, connecting major districts like Shinjuku and Roppongi.
