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The 321 series was developed from the earlier 207 series to replace the ageing 201 series and 205 series trains on the Tōkaidō Main Line.[2] One 321 series set also replaced the 207 series (set Z16) withdrawn due to collision damage sustained in the Amagasaki derailment of 25 April 2005.
Operations
The 321 series share the same assignments as their 207 series counterparts.[3][4] All 39 sets are allocated to Aboshi depot.
^"321系通勤形直流電車の新製投入" [Introducing a new 321 series commuter DC train]. westjr.co.jp (in Japanese). 8 July 2005. Archived from the original on 30 August 2005. Retrieved 8 December 2021.
^JR電車編成表 [JR train organization table] (in Japanese). Japan: 交通新聞社. 16 November 2016. p. 178. ISBN9784330737164.
