The Nagoya Municipal Subway (), also known as the Nagoya Subway, is a rapid transit system serving Nagoya, the capital of Aichi Prefecture, Japan operated by the Nagoya City Transportation Bureau. The system opened in 1957, consisting of six lines with a total route length of 93.3 km (58.0 mi) and serves 87 stations, approximately 90 percent of which are located underground.
Like other major Japanese cities such as Tokyo and Osaka, NagoyaâÂÂs rail transportation system is heavily complemented by suburban railways, together forming an extensive network of 47 lines in and around Greater Nagoya. Of these, the subway lines account for approximately 38 percent of Greater NagoyaâÂÂs total rail ridership of about 3 million passengers per day. In 2002, the system introduced Hatchii as its official mascot.
Under Nagoya City regulations, the systemâÂÂs official name is Nagoya City Rapid Transit (Ã¥ÂÂå¤å±Âå¸Âé«ÂéÂÂ度éÂÂéÂÂ).
The network serves all 16 wards of Nagoya with the exception of Moriyama, and also extends to Nisshin, the only municipality outside Nagoya City with a station on the network.
NagoyaâÂÂs population grew rapidly after World War I and surpassed one million in 1934. At the time, city trams, the primary mode of transportation operated by the Nagoya City Transportation Bureau were severely overcrowded, prompting consideration of alternative measures, including the construction of a subway system following precedents set in Tokyo (1927) and Osaka (1933).
In 1936, Nagoya CityâÂÂs first plan for a municipally operated subway was announced. The plan proposed the construction of seven lines totaling approximately 52 km, to be built in two phases; however, the project was shelved due to high construction costs and preparations for the Nagoya Pan-Pacific Peace Exposition the following year. The prolonged Sino-Japanese War placed increasing strain on NagoyaâÂÂs finances. However, as the city developed into a major militaryâÂÂindustrial center, the Provisional Nagoya City and Suburban Transportation Research Committee was established in 1939. After reviewing earlier subway proposals, the committee announced a revised plan consisting of four core lines totaling approximately 29 km. Nevertheless, the outbreak of World War II led to the suspension of all subway planning activities.
After the war, a basic plan proposing four lines with a total length of approximately 43 km was announced in January 1946 as part of efforts to develop a high-speed railway network. Drafted as an urban planning measure for postwar reconstruction and based on an assumed future population of 2 million, the plan primarily aimed to secure land for railway construction prior to the commencement of building work.
On January 19, 1950, the Ministry of Construction issued Notification No. 9, designating approximately 48.4 km of the planned route as part of the Nagoya Reconstruction Urban Planning High-Speed Railway Network (Ã¥ÂÂå¤å±Â復èÂÂé½å¸Âè¨Âç»é«ÂéÂÂ度éÂÂéÂÂè·¯ç·Â網). Construction of the NagoyaâÂÂSakaemachi section began in August 1954, and operational testing of a prototype train commenced in 1956 on the Nagoya City Tram Shimonoichishiki Line.
On November 15, 1957, the Nagoya Municipal Subway opened its first section, between Nagoya and Sakaemachi (now Sakae). The initial fare between the two stations was a flat rate of 15 yen for adults and 8 yen for children, and one test ticket was distributed to each household in Nagoya City.
The six lines that comprise the Nagoya subway network are, for the most part, independent. However, Meikà  Line services partially interline with the Meijà  Line, and the operations of both lines are combined. Therefore, there are in fact five distinct services on the subway. They are mostly self-contained, but two of its lines have through services onto lines owned and operated by Meitetsu, the largest private railway operator in the region. One of these, the Kamiida Line, is essentially an extension of the Meitetsu Komaki Line to which it connects.
The first two subway lines, the Higashiyama and Meijà Â/Meikà  Lines, run on standard gauge track and use 600 volt DC electrification from a third rail. They are three of the eleven subway lines in Japan which use both third-rail electrification and standard gauge track (the Ginza and Marunouchi lines in Tokyo are the only other two lines to use third rail at that voltage; five of the eight lines of the Osaka Metro and the Blue Line in Yokohama all use 750 V DC third rail). Subsequent lines were built to narrow gauge and employ 1,500 volt DC electrification from overhead lines, in common with most other rapid transit lines in the country.
As with other railway lines in Japan, tickets can be purchased from ticket vending machines in stations. Since February 2011, this has largely been supplemented by Manaca, a rechargeable smart card. In 2012, Manaca replaced Tranpass, the predecessor integrated ticketing system, which was also able to be used at subway stations and for other connected transportation systems in the region.
On January 4, 2023, four stations were renamed:
The Nagoya Municipal Subway is closely integrated with JR Central services, including the Tà Âkaidà  Shinkansen, at several major transfer points. Nagoya Station functions as the principal interchange, where the Higashiyama Line (Line 1) and the Sakura-dà Âri Line (Line 6) connect directly via underground passageways to the JR Tà Âkaidà  Main Line platforms and the Shinkansen concourse located on the upper levels of the station complex. These arrangements are designed to handle heavy passenger flows, with shared concourses equipped with multilingual guidance, escalators, and elevators to facilitate efficient movement between subway facilities and JR ticket gates.
The Nagoya Municipal Subway maintains extensive interchanges with private railway operators, primarily Meitetsu and Kintetsu, to support regional connectivity within Aichi Prefecture and beyond.
The Nagoya Municipal Subway is predominantly composed of underground stations, with platforms designed using durable tiles to accommodate high passenger volumes and ensure ease of maintenance. Island platforms are commonly used on loop lines like the Meijà  Line, enabling efficient cross-platform transfers and streamlining operations in the city's densely populated areas. The subwayâÂÂs architectural style reflects modernist influences from the 1960s, as seen in decorative elements such as the colorful murals at Sakae Station, which introduce artistic flair to the system's functional spaces. In response to the 1995 Great Hanshin earthquake in Kobe, new constructions and upgrades incorporated seismic-resistant features, including reinforced concrete and flexible joints, to minimize the risk of damage during earthquakes in the underground sections.
Tunnel construction methods differ by line in response to geological conditions and urban density. For example, the Higashiyama Line primarily utilizes deep-bored tunnels to pass beneath heavily built-up areas, whereas the Sakura-dà Âri Line was largely constructed using the cut-and-cover technique, allowing for shallower alignments and more accessible construction.
Visual branding plays a role in passenger wayfinding, with each line assigned a distinctive color, such as yellow for the Higashiyama Line and purple for the Meijà  Line, consistently applied across maps, signage, and station identifiers. The systemâÂÂs mascot, Hatchii, introduced in 2002, features prominently in informational and promotional materials. Designed as a friendly, uniformed character drawing inspiration from local imagery, Hatchii is used to promote safety awareness and familiarity with the subway network.
The Nagoya Municipal Subway has implemented comprehensive accessibility measures, including the installation of elevators at all stations to provide step-free routes between street level and platforms for passengers with mobility challenges. Escalators are also extensively installed at station entrances and on platforms, supporting barrier-free circulation throughout the network. Tactile paving for visually impaired users has been progressively introduced, building on early nationwide adoption in Japan beginning in 1967. Further expansions continued into the 2000s, with newer stations such as Nagoya Daigaku (opened in 2003) incorporating tactile guidance along platforms and pedestrian routes to enhance navigability.
Station facilities are designed to improve passenger comfort and usability. All stations are equipped with multipurpose restrooms that include baby-changing tables and ostomate facilities, accommodating families and passengers with specialized needs. Vending machines selling drinks, snacks, and daily necessities are commonly found in station concourses and on platforms. Free internet access is available through the NAGOYA Free Wi-Fi service at 85 stations, with Kami-Otai and Kami-Iida as the only exceptions. To assist international visitors, multilingual signage in English, Chinese, Korean, and other languages is prominently displayed at major interchange stations such as Nagoya Station.
Safety measures form a core component of station operations. Closed-circuit television (CCTV) systems are installed throughout stations and platforms to support security monitoring, and emergency intercoms are provided for rapid communication with staff. Movable platform edge barriers, functioning as half-height screen doors, have been introduced on the Higashiyama, Sakura-dà Âri, and Kamiida lines to reduce the risk of falls and improve passenger safety. Installation on the Tsurumai Line is ongoing, with the first barriers entering service at Shà Ânai Ryokuchi Kà Âen Station in October 2024 and systemwide completion targeted for 2026.
The standard-gauge routes of the Nagoya Municipal Subway (the Higashiyama, Meijà Â, and Meikà  lines) generally operate 6-car trainsets as their baseline configuration, balancing peak-period capacity requirements with platform length constraints and energy efficiency. Rolling stock on these lines is constructed with lightweight stainless-steel car bodies, offering improved durability and corrosion resistance while lowering long-term maintenance demands relative to earlier aluminum-bodied trains. Traction power is supplied via a 600 V DC third-rail system using shoe-type current collectors, allowing reliable operation throughout the predominantly underground network.
The narrow-gauge routes of the Nagoya Municipal Subway (the Tsurumai, Sakura-dà Âri, and Kamiiida lines) are built to a 1,067 mm track gauge and are electrified using a 1,500 V DC overhead catenary system, with trains collecting power via pantographs. The Tsurumai and Sakura-dà Âri lines operate primarily with 5- and 6-car trainsets, while the shorter Kamiiida Line uses 4-car formations suited to its service patterns and through-running with the Meitetsu Komaki Line. Despite the narrower gauge, rolling stock on these lines features relatively wide car bodies, measuring approximately 2.8 meters, to optimize passenger capacity. Interior and exterior designs incorporate accessibility understandings such as low-step boarding, priority seating for elderly and mobility-impaired passengers, and LED lighting to enhance visibility and energy efficiency.