[3] 3rd-batch trainsets based on the JR East E233-2000 series design were introduced from September 2013.

[2] Passenger information is provided by LED scrolling displays above the doorways.

[2] Three fourth-batch sets have two LCD passenger information screens above each doorway.

[2] The majority of the sets were built by Tokyu Car Corporation (now J-TREC) in Yokohama, but the intermediate cars of the three sets 10-450 to 10-470 were built at JR East's Niitsu factory in Niigata Prefecture, and these were transferred to Tokyu Car's Yokohama factory in two batches in January and February 2006 to be incorporated into the completed sets.

[2] The first set, 10-370, was delivered in November 2004 for night-time testing of the new D-ATC signalling system.

[2] The newly formed ten-car sets (10-450 to 10-480) entered revenue service from 1 June 2010.