As of 2026, the title for the fastest Shinkansen in commercial operation is shared between the Nozomi service on the Tokaido/Sanyo line and the Hayabusa service on the Tohoku line, though they achieve their "speed" in different ways. The Hayabusa, utilizing the E5 or H5 series trainsets, reaches the highest maximum operating speed in Japan at 320 km/h (approx. 200 mph) between Utsunomiya and Morioka. The Nozomi, while technically capped at a slightly lower top speed of 285 km/h on the Tokaido line and 300 km/h on the Sanyo line, is often considered the "fastest" in terms of total travel time between major hubs like Tokyo and Osaka because it makes the fewest stops. However, the future of Japanese rail speed lies with the L0 Series Maglev, which is currently undergoing testing on the Chuo Shinkansen line. This magnetic levitation train has shattered world records by reaching a staggering 603 km/h (375 mph) in test runs. Once it enters commercial service (expected in the late 2020s or early 2030s), it will cut the travel time between Tokyo and Nagoya to just 40 minutes, significantly outperforming any traditional wheeled bullet train in existence.