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Magnetic levitation technology, tunnels under urban areas and mountains, rising costs, and a prolonged environmental dispute have transformed the Linear Chuo Shinkansen into one of Japan’s most complex railway projects, still surrounded by uncertainties about deadlines, budget, and local impacts.
Japan has advanced in its attempt to unlock the Linear Chuo Shinkansen, a magnetic levitation railway designed to operate at up to 500 kilometers per hour and connect Tokyo, Nagoya, and Osaka through a route built almost entirely in tunnels.
After years of deadlock, Shizuoka Governor Yasutomo Suzuki authorized the continuation of preparations on the section that crosses the province, paving the way for engineering stages that remained stalled due to environmental and political concerns.
According to the Central Japan Railway Company, known as JR Central or JR Tokai, about 90% of the 286 kilometers between Shinagawa in Tokyo and Nagoya will be underground, with passages under densely urbanized areas and the mountains of the Japanese Alps.
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With the first stage completed, the travel time between Shinagawa and Nagoya is expected to drop from approximately 86 to 40 minutes, while the future extension to Osaka could reduce the entire journey from about 134 to just 67 minutes.
Environmental agreement unlocks works in Shizuoka
In July 2026, Suzuki announced that the provincial government would sign an environmental conservation agreement with JR Central, a requirement considered essential to allow work on the 8.9-kilometer segment located within Shizuoka’s territory.
The authorization changed the stance adopted by former Governor Heita Kawakatsu, who conditioned the project’s progress on broader guarantees regarding the preservation of the Oi River and the ecosystem located in the Southern Japanese Alps.
Although the line crosses the province, no station is planned for Shizuoka, a circumstance that increased local resistance and kept the debate focused on the possible effects of excavation on groundwater and the river’s flow.
Used by residences, agricultural properties, and industrial facilities, the Oi River became the main point of concern because studies presented by the operator indicated that the tunnel could displace part of the groundwater to areas outside the watershed.
To gain approval, the company committed to monitoring, returning the volume that enters the tunnels to the river, and paying compensation if damages related to the construction of the new magnetic levitation railway are proven.
Despite the political progress, excavations will not begin immediately on a full scale, as the company must still complete technical surveys, fulfill administrative procedures, and implement protection measures defined with authorities and municipalities in the region.
Construction may advance for more than ten years
According to JR Central’s calculations, executing the Shizuoka section will take at least a decade, even with the start of services in 2026, due to geological complexity and the requirements imposed to protect water resources.
In this scenario, commercial opening between Shinagawa and Nagoya is not expected before the second half of the 2030s, a timeline quite different from the initial goal, which anticipated the start of regular line operation in 2027.
The schedule was abandoned because the company could not begin drilling in the province within the necessary period to integrate this segment with the other construction fronts distributed along the route between Tokyo and Nagoya.
In addition to environmental restrictions, the work will face geologically complex mountains, deep tunnels, and an extensive operation to remove and transport the excavated material, factors that increase technical risks and complicate precise completion forecasts.
Problems recorded at other sites also increased scrutiny of the project, after drilling was associated with underground water leaks, a drop in well levels, and soil movements in areas close to the works.
Due to these occurrences, local authorities began to require permanent monitoring, disclosure of collected data, and protocols capable of interrupting or modifying excavations whenever significant changes in the terrain or watercourses are identified.
Maglev line budget reaches 11 trillion yen
Another obstacle is the cost of the first phase, which has increased significantly since the project’s launch and reached 11 trillion yen for the section between Shinagawa and Nagoya, according to an estimate released in October 2025.
Compared to the previous estimate, set at 7.04 trillion yen, the new calculation represents an increase of approximately 4 trillion, while the budget presented in the initial stages, in 2014, was about 5.5 trillion.
The operator attributed the revision to rising material prices, increased labor expenses, changes in construction conditions, and additional costs required by more complex engineering interventions than expected.
Depending on the exchange rate, the current projection is equivalent to approximately US$ 68 billion, a different value from the US$ 114 billion mentioned in the title, which refers to an estimate of the economic impact associated with the railway project.
As protection against new increases, the company included a reserve of 1 trillion yen in the budget, although factors such as inflation, labor shortages, and technical difficulties may still cause other revisions during execution.
New route will strengthen the Japanese railway system
More than reducing travel time, the Linear Chuo Shinkansen was planned to create an alternative to the Tokaido Shinkansen, a conventional high-speed line that follows part of the Japanese coast and connects the country’s main metropolitan regions.
The existence of a second connection is considered strategic because the coastal corridor is exposed to the effects of major earthquakes, especially those related to the Nankai Trough, identified as one of Japan’s areas of greatest seismic concern.
In the maglev system, magnetic fields suspend and propel the vehicles, reducing physical contact with the track during travel and allowing speeds higher than those recorded by conventional trains currently operating in Japanese territory.
Even with the Shizuoka impasse addressed, deadline, budget, excavation safety, and environmental protection will continue to be decisive for the future of the railway, whose completion will depend on the balance between mobility gains, rising costs, and local impacts.
