[1] The 3000 series sets are formed as shown below:[1] Passenger accommodation consists of longitudinal bench seating throughout, with each car having a wheelchair space.

[1] Details of the 3000 series on order were first officially announced in January 2020.

[3] The selected design of the 3000 series trains was announced on 18 May 2021 after a public vote that took place in March of the same year.

[6] On 16 October 2024, the Sendai City Transportation Bureau and Hitachi announced that the 3000 series received the 2024 Good Design Award.

[7] The train type entered revenue service on 24 October 2024.