Tōkaidō Shinkansen in the context of "Tokyo Station"

The Taiheiyō Belt (Japanese: 太平洋ベルト, Hepburn: Taiheiyō Beruto; lit. "Pacific Belt"), also known as the Tōkaidō corridor, is the megalopolis in Japan extending from Ibaraki Prefecture in the northeast to Fukuoka Prefecture in the southwest, running for almost 1,200 km (750 mi). Its estimated population as of 2011 was about 80 million.

The urbanization zone runs mainly along the Pacific coast (hence the name) of Japan from Kantō region to Osaka, and the Inland Sea (on both sides) to Fukuoka, and is concentrated along the Tōkaidō–Sanyō rail corridor. A view of Japan at night clearly shows a rather dense and continuous strip of light (demarcating urban zones) that delineates the region. The high population is particularly due to the large plains – the Kantō Plain, Kinai Plain, and Nōbi Plain – which facilitate building in otherwise mountainous Japan.

High-speed rail (HSR) is a type of rail transport network utilizing trains that run significantly faster than those of traditional rail, using an integrated system of specialized rolling stock and dedicated tracks. While there is no single definition or standard that applies worldwide, lines built to handle speeds of at least 250 km/h (155 mph) or upgraded lines of at least 200 km/h (125 mph) are generally considered to be high-speed.

The first high-speed rail system, the Tōkaidō Shinkansen, began operations in Honshu, Japan, in 1964. Due to the streamlined spitzer-shaped nose cone of the trains, the system also became known by its English nickname bullet train. Japan's example was followed by several European countries, initially in Italy with the Direttissima line, followed shortly thereafter by France, Germany, and Spain. Today, much of Europe has an extensive network with numerous international connections. Construction since the 21st century has led to China taking a leading role in high-speed rail. As of 2023, China's HSR network accounted for over two-thirds of the world's total.

The San'yō Shinkansen (山陽新幹線) is a line of the Japanese Shinkansen high-speed rail network, connecting Shin-Osaka in Osaka with Hakata Station in Fukuoka, the two largest cities in western Japan. Operated by the West Japan Railway Company (JR West), it is a westward continuation of the Tōkaidō Shinkansen and also serves other major cities in between on Honshu and Kyushu islands such as Kobe, Himeji, Okayama, Hiroshima, and Kitakyushu, through the Shin-Kanmon Tunnel. The Kyushu Shinkansen continues south of Hakata to Kagoshima. The San'yō Shinkansen connects Hakata with Osaka in two and a half hours, with trains operating at a maximum speed of 300 km/h (186 mph) for most of the journey. Some Nozomi trains operate continuously on San'yō and Tōkaidō Shinkansen lines, connecting Tokyo and Hakata in five hours.

The Chūō Main Line (Japanese: 中央本線, Hepburn: Chūō-honsen), commonly called the Chūō Line, is one of the major trunk railway lines in Japan. It connects Tokyo and Nagoya, although it is the slowest direct railway connection between the two cities; the coastal Tōkaidō Main Line is slightly faster, and the Tōkaidō Shinkansen is currently the fastest rail link between the cities.

The eastern portion, the Chūō East Line (中央東線, Chūō-tōsen), is operated by the East Japan Railway Company (JR East), while the western portion, the Chūō West Line (中央西線, Chūō-saisen), is operated by the Central Japan Railway Company (JR Central). The dividing point between the two companies is Shiojiri, where express trains from both operators continue north onto the Shinonoi Line towards the cities of Matsumoto and Nagano. Compared to the huge urban areas at either end of the Chūō Line, its central portion is lightly traveled; the Shiojiri-Nakatsugawa corridor is only served by one limited express and one local service per hour.

The Central Japan Railway Company is the main railway company operating in the Chūbu (Nagoya) region of central Japan. It is officially abbreviated in English as JR Central and occasionally as JR Tokai (Japanese: JR東海). The term Tōkai refers to the Tōkai region (the southern portion of Central Japan), in which the company chiefly operates.

JR Central's operational hub is Nagoya Station, and the company's administrative headquarters are located in the JR Central Towers above the building. The busiest and longest railway line operated by JR Central is the Tōkaidō Main Line between Atami and Maibara; this largely parallels the company's high-speed rail service, the Tōkaidō Shinkansen, which runs between Tokyo and Shin-Ōsaka. JR Central is additionally responsible for the Chūō Shinkansen – an under-construction maglev service between Tokyo and Osaka, which is due to start operation between Tokyo and Nagoya in 2034.

Shin-Ōsaka Station (Japanese: 新大阪駅, Hepburn: Shin-Ōsaka-eki; lit. 'New Osaka Station') is a major interchange railway station in Yodogawa-ku, Osaka, Japan. It is the western terminus of the high-speed Tōkaidō Shinkansen from Tokyo, the eastern terminus of the San'yō Shinkansen from Fukuoka, and one of the primary rail hubs in Osaka. The two Shinkansen lines are physically connected, allowing many services to operate through between them.

The station opened in 1964 and was built about 3 kilometres (1.9 mi) from the older Ōsaka Station to avoid the engineering challenges of extending the Shinkansen line into the city center. The JR Kyoto Line and the Midōsuji Line subway offer convenient connections to other major destinations throughout central Osaka.

Hikari (ひかり; "Light") is a high-speed train service running on the Tōkaidō and San'yō Shinkansen "bullet train" lines in Japan. Slower than the premier Nozomi but faster than the all-stations Kodama, the Hikari is the fastest train service on the Tōkaidō and San'yō Shinkansen that can be used with the Japan Rail Pass, which is not valid for travel on the Nozomi or Mizuho trains except through a special supplementary ticket.