Since carbon steel was used for the material for the bodies of the train-cars utilized on the Tokaido Shinkansen line and Sanyo Shinkansen line in the era of JNR, such as the 0 series Shinkansen train-cars and 100 series Shinkansen train-cars, the bodies were comparatively heavy.
新幹線0系電車や新幹線100系電車など国鉄時代の東海道・山陽新幹線車両では車体の素材に炭素鋼が使われていたためやや重かった。