The Shinkansen, literally meaning "New Trunk Line," is a type of High-Speed Rail (HSR) system that operates on a dedicated network of tracks separate from conventional trains. In 2026, it is primarily categorized as an Electric Multiple Unit (EMU), meaning there is no single locomotive at the front pulling the cars; instead, electric motors are distributed under the floors of multiple cars throughout the train. This allows for rapid acceleration and smoother braking. The Shinkansen runs on standard gauge (1,435 mm) tracks, which are wider than Japan's traditional narrow-gauge lines, allowing for the stability needed to reach speeds of 320 km/h (200 mph). The system is famous for its Automatic Train Control (ATC), which eliminates the need for trackside signals and allows the train to be controlled by a centralized computer network. In 2026, the fleet consists of various "series" (like the E5, N700S, and the upcoming L0 maglev), all designed with distinct "long-nose" aerodynamics to prevent "tunnel boom" noise pollution in Japan's mountainous terrain.