**E131-0 Series (Boso)** (2021.03 ~) <img width="175" height="100" alt="Image" src="https://github.com/user-attachments/assets/6ec4ab1d-58d6-46c5-b9a6-cd514830de18" /> **E131-500 Series (Sagami Line)** (2021.11 ~) <img width="175" height="150" alt="Image" src="https://github.com/user-attachments/assets/8b355095-b02c-45db-bc01-1363de43a423" /> **E131-600 Series (Nikko Line · Utsunomiya Line)** (2022.3 ~) <img width="175" height="125" alt="Image" src="https://github.com/user-attachments/assets/1e485d1b-544d-4e1b-a609-280518f897be" /> **E131-800 Series (Senseki Line)** (2025.12 ~) <img width="175" height="150" alt="Image" src="https://github.com/user-attachments/assets/3411ba9a-f67e-4b25-9728-509eedda7c0e" /> **E131-1000 Series (Tsurumi Line)** (2023.12 ~) <img width="175" height="125" alt="Image" src="https://github.com/user-attachments/assets/eb97fcab-409e-4208-a7fc-3c9ee6fcf721" /> Formation <img width="215" height="165" alt="Image" src="https://github.com/user-attachments/assets/164b5794-01c8-4247-850f-9910156f74fd" />
E131-0 Series (Boso) (2021.03 ~)
E131-500 Series (Sagami Line) (2021.11 ~)
E131-600 Series (Nikko Line · Utsunomiya Line) (2022.3 ~)
E131-800 Series (Senseki Line) (2025.12 ~)
E131-1000 Series (Tsurumi Line) (2023.12 ~)
Formation