Due to differing vehicle construction, car 1004 in set B had unusual elongated hexagonal windows.

Among the features not continued on the production 0 series units were externally sliding doors, and a translucent nose section illuminated from inside by fifteen 20 W fluorescent tubes.

[1] Urinals were also provided – the first time on general Japanese trains other than dedicated school-trip EMUs.

[2] The first car to be built, 1001, was delivered on 16 April 1962 from Tokyo Kisha's factory in Kōtō, Tokyo, and transferred by road and rail to Nippon Sharyo's Warabi factory in Kawaguchi, Saitama on 17 April.

[4] A speed of 190 km/h (118 mph) was first recorded on 27 October 1962 by set B, breaking the previous record of 175 km/h (109 mph) set by the narrow-gauge (1,067 mm (3 ft 6 in)) KuMoYa 93 test train on 21 November 1960.