C ) ▁in ▁Y ok oh ama , ▁but ▁the ▁intermediate ▁cars ▁of ▁the ▁three ▁sets ▁ 1 0 - 4 5 0 ▁to ▁ 1 0 - 4 7 0 ▁were ▁built ▁at ▁J R ▁East ' s ▁Ni its u ▁factory ▁in ▁ ▁Ni ig ata ▁Pref ect ure , ▁and ▁these ▁were ▁transferred ▁to ▁Tok y u ▁Car ' s ▁Y ok oh ama ▁factory ▁in ▁two ▁batch es ▁in ▁January ▁and ▁February ▁ 2 0 0 6 ▁to ▁be ▁incorpor ated ▁into ▁the ▁completed ▁sets . ▁The ▁first ▁set , ▁ 1 0 - 3 7 0 , ▁was ▁delivered ▁in ▁November ▁ 2 0 0 4 ▁for ▁night - time ▁testing ▁of ▁the ▁new ▁D - AT C ▁sign alling ▁system . ▁The ▁first ▁sets ▁entered ▁re venue ▁service ▁on ▁ 2 1 ▁May ▁ 2 0 0 5 . ▁ ▁The ▁six ▁eight - car ▁ 1 0 - 3 0 0 R ▁series ▁sets ▁were ▁created ▁in ▁ 2 0 0 5 ▁and ▁ 2 0 0 6 ▁by ▁adding ▁new ▁ 1 0 - 3 0 0 ▁series ▁driving ▁cars ▁built ▁by ▁Tok y u ▁Car ▁sand wich ing ▁three ▁pairs ▁of ▁ref urb ished ▁ 1 0 - xx 7 ▁and ▁ 1 0 - xx 8 ▁cars ▁from ▁former ▁ 1 0 - 0 0 0 ▁series ▁sets ▁ 1 0 - 0 1 0 ▁to ▁ 1 0 - 1 8 0 . ▁▁ ▁The ▁newly ▁formed ▁ten - car ▁sets ▁(