JR East, officially East Japan Railway Company, is one of the main Japan Railways Group passenger operators. The company serves Tokyo, Kanto, Tohoku, Niigata, Nagano, and parts of nearby prefectures. JR East operates Shinkansen services on the Tohoku, Joetsu, Hokuriku eastern section, Yamagata, and Akita corridors, plus Narita Express, Limited Express, rapid, local, and Tokyo metropolitan trains. Key cities served include Tokyo, Omiya, Sendai, Morioka, Shin-Aomori, Niigata, Nagano, Yamagata, and Akita. Rail Monsters supports online booking for selected JR East tickets, with schedules and ticket details shown during search.