The is an electric multiple unit (EMU) train type operated on the Saitama Rapid Railway Line in Saitama Prefecture, Japan, by the third-sector railway operating company Saitama Railway Corporation since March 2001.
The trains are used on Saitama Rapid Railway Line services, with through-running to and from the Tokyo Metro Namboku Line, Tokyu Meguro Line, and the Tokyu Shin-Yokohama Line.
As of 1 April 2014, the fleet consists of 10 six-car sets, each formed of three motored ("M") cars and three non-powered trailer ("T") cars, as shown below, with car 1 at the northern (Urawa-Misono) end.
Passenger accommodation consists of longitudinal bench seating with priority seats in each car.
The 2000 series trains entered service on 28 March 2001, coinciding with the opening of the Saitama Rapid Railway Line.
In February 2026, Saitama Railway Corporation announced that it would refurbish the 2000 series fleet beginning in fiscal 2027. Refurbished sets are scheduled to return to revenue service from fiscal 2028.