都心から房総方面へ向かう特急型車両のデザイン。房総半島の白浜、菜の花、房総の海をモチーフに255系で確立したデザインイメージをE257系500番台で継承・進化させた。255系は国鉄からJRへと分割民営化された初期の頃に開発された特急型車両の一つで、国鉄時代と一線を画するデザインは、鉄道ルネッサンスといわれた。
The design of the limited express trains that go from central Tokyo to Boso. The Series 255 was one of the express trains developed in the early days of the privatization of Japan Railways (JNR) into JR, and its design, which was distinctly different from the JNR era, was called a railroad renaissance. The design was a departure from the JNR era and was called a railway renaissance.
