Series E233-7000 was introduced in 2013 to replace the 205 series on the Saikyo Line. In addition to its mutual through service with the Tokyo Waterfront Area Rapid Transit Rinkai Line, it is now also deployed in mutual through service with the Sagami Railway. It operates across a wide range of sections, including from Kawagoe to Shin-Kiba and Ebina.
- Compatible with interior lighting kit Kato 11-211 (11-212)