車体・台車・主回路システムを一新した節目となる通勤型車両。技術面に加え、大型窓・独立した座席・座席間のスタンションポール(握り棒)・座席端部仕切りパネルなど乗客への新しいサービス（体験価値向上）を実現し、現在の通勤車両のベースを創った。
This commuter railcar marks a milestone in the development of new car bodies, bogies, and main circuit systems. In addition to the technical aspects, new services for passengers (improved experience) such as large windows, independent seats, stanchion poles between seats, and partition panels at the seat ends were realized, creating the basis for today's commuter railcars.
