The E231 series, which has been active on the Joban Line, debuted in 2002, replacing the 103 series. It consists of 10-car and 5-car formations, operating as the longest 15-car train among the commuter-type E231 series. The body features a blue-green line, which is the line color, and an Uguisu color line to prevent confusion with the local lines. Alongside the E531 series for mid-distance travel, the E231 series operates between Ueno and Toride on the Joban Rapid Line and between Abiko and Narita on the Narita Line. Since the opening of the Ueno-Tokyo Line in 2015, its network expanded, providing access to Shinagawa.
- Model of the 110/123 formation from the Matsudo Vehicle Center
- Reproduction of the updated underfloor equipment of MOHAE230/MOHAE231 (some specifications differ due to the use of existing parts)
- Roof-mounted coolers: Cars 1, 2, 6-10, 13, and 15 equipped with AU725A, while cars 3-5, 11, 12, and 14 feature AU725B
- Front cars equipped with head/tail lights, and front destination displays illuminate (using warm white LED). Cars 10, 11, and 15 come with a light-off switch
- The front coupling of the first car has a dummy coupler, while cars 10, 11, and 15 utilize the KATO coupler tight connection type (without hook) with electrical connectors
- Intermediate couplings adopt body-mounted KATO coupler tight connection type (with hook)
- Slotless motor ensures smooth and quiet operation
- Printed wheelchair, stroller marks, and weak air-conditioning car indications
- The basic set and 5-car set store a full 15-car formation in the bookcase
- Compatible with interior lighting kit Kato 11-211 (11-212)
JPY 
Euros
British Pounds
Australia Dollars
US Dollars
Canada Dollars
Chinese Yuan
Singapore Dollar
Hong Kong Dollar
