As a measure for this situation, JR East introduced two-level train-cars, which were called Max and were provided with lots of seats, increasing the number of passenger seats per train-car drastically.
これに対応してJR東日本ではMax(鉄道車両)という多座席型の2階建車両を投入し、1列車あたりの定員を大幅に増やした。