717-0 series: 3-car 20 kV AC 50 Hz sets converted from former 451 series cars for use in the Sendai area
717-100 series: 3-car 20 kV AC 50 Hz sets converted from former 451 and 453 series cars for use in the Sendai area
717-200 series: 7 x 2-car 20 kV AC 60 Hz sets converted from November 1986 from former 475 series cars for use in Kyushu
717-900 series: One 2-car 20 kV AC 60 Hz set converted from former 457 series cars for use in Kyushu
717-0 series
Five 3-car 20 kV AC 50 Hz sets were converted from former 451 series cars with new bodies for use in the Sendai area on Tohoku Main Line and Joban Line local services. These sets were painted cream with a green bodyside stripe. The last remaining set was withdrawn in August 2008.
Formations
The five 3-car sets, numbered T1 to T5, were formed as follows.
Designation
Mc
M'
Tc'
Numbering
KuMoHa 717
MoHa 716
KuHa 716
The MoHa 716 car was fitted with one lozenge-type pantograph.
Interior
These sets were made entirely no-smoking from 22 March 1997.
Five 3-car 20 kV AC 50 Hz sets converted from former 451 and 453 series cars with new bodies for use in the Sendai area on Tohoku Main Line and Joban Line local services. These sets were painted cream with a green bodyside stripe.
Formations
The five 3-car sets, numbered T101 to T105, were formed as follows.
Designation
Mc
M'
Tc'
Numbering
KuMoHa 717-100
MoHa 716-100
KuHa 716
The MoHa 716 car was fitted with one lozenge-type pantograph. These sets were made entirely no-smoking from 22 March 1997.
7 x 2-car 20 kV AC 60 Hz sets were converted from former 475 series cars with new bodies from November 1986 at JNR's Kokura and Kagoshima factories for use in Kyushu. The body design of these sets was identical to the earlier 713 series, with two pairs of sliding doors on each side. Four sets were converted in fiscal 1986, and three more sets were converted in fiscal 1987. The latter batch differed in having no door pocket windows. These sets were painted white with a blue bodyside stripe. , only sets HK203 and HK204 are in service, used on early morning and late night services only in the Kagoshima area, with all other sets withdrawn or stored pending withdrawal. Both sets were later withdrawn in 2014 with the increasing number of 817 series cars on the railway.
Formations
The 2-car sets, numbered HK201 to HK207, are formed as follows. The KuMoHa 716-200 car is fitted with one lozenge-type pantograph.
717-900 series
One 2-car 20 kV AC 60 Hz set was converted from former 457 series cars in March 1995 for use in Kyushu, based at Kagoshima Depot. The conversion work involved adding another pair of sliding doors in the centre of each side. Internally, some of the original transverse seating bays were replaced with longitudinal bench seating. The sole 717-900 series set was withdrawn in December 2010.
Formation
The single 2-car set, HK901, was formed as follows. KuMoHa 717-901 was converted from KuMoHa 457-14, and KuMoHa 716-901 was converted from former intermediate car MoHa 456-14 with the cab end from 455 series KuHa 455-601.
