- The E231 Series 1000, introduced in 2000, replaced the 115 and 211 series, which were active on the Utsunomiya Line (Tohoku Line) and Takasaki Line. The formations deployed to the OYAMA Vehicle Center in the early 2000s have distinct features from the later vehicles for the Tokaido Line appearing from 2004. These include continuous green belts along the side panel, long board extending to the conductor door on the front car, a non-glass cockpit console, and differing toilet placements in the formation.
- The product is available in the current updated specification for both 10-car and 5-car formations. Enjoy a maximum 15-car operation by combining with the popular E231 Series 1000 Tokaido Line (updated) or the E233 Series 3000 Tokaido Line and Ueno-Tokyo Line sets.
- Features the updated specifications of U522 (10 cars) and U60 (5 cars) formations from OYAMA Vehicle Center.
- Recreates features typical of early models, such as continuous green bands on the side panels and small coolers installed across the roof.
- Replicates long boards extending above the driver’s door on front cars and the non-glass cockpit console.
- Realistically captures the front glass state of car 15 (KUHA E231-8022) with film applied around the destination and operation number displays.
- New production of AU725B coolers (manufactured by TORA Transport Tech) applied to cars 6-10 and 14-15.
- Reproduces the 10th car (KUHA E231-6022) without a toilet and the 6th car (SAHA E231-6022) with a toilet.
- Both 10-car and additional 5-car sets replicate the underfloor equipment of updated MOHAE230/MOHAE231.
- Features a reproduction of the SaRoE231/E230 bogie with Yaw dampers removed.
- Incorporates a coreless motor for smooth and quiet running.
- Includes "Miya Yama" for affiliation markings and "P" and "SN" for safety device indications.
- Head and tail lights, along with front-end destination display (using white LED). Cars 10 (KUHA E231-6022) and 11 (KUHA E230-6022) have an off switch.
- Dummy couplers are used at the leading connection of the 1st and 15th cars, while the 10th and 11th cars feature KATO knuckle couplers (hookless), with electrical couplers included.
- The standard body-mounted KATO knuckle couplers (with hooks) for the intermediate connections ensure a realistic coupling appearance and smooth operation.
- Compatible with interior lighting kit Kato 11-211 (Kato 11-212)