185 series

The 10-car sets A1 to A8 are formed as follows, with car 1 at the Izu end.[1]

Cars 3, 7, and 9 each have one lozenge-type pantograph.[1]

The 5-car sets C1 to C7 are formed as follows, with car 11 at the Izu end.[1]

Car 14 is equipped with a lozenge-type pantograph.[1]

Between 1993 and 1998, the original Japanese-style toilets in cars 1, 5, and 10 of the A sets, and cars 11 and 15 of the C sets were replaced with western-style toilets. In 1998, the Green car seats were upgraded. Then, from 1999 to 2002, all sets underwent refurbishment, which primarily involved replacing the original flip-over seating in standard-class cars with rotating/reclining seats to bring the level of accommodation in line with other limited express rolling stock. Externally, the sets were repainted from the original white livery with diagonal green stripes to white with "Shōnan" green and orange blocks.

• 
  Interior view showing original flip-over seating in June 1999

The 7-car sets OM01 to OM09 are formed as follows, with car 1 at the south (Ueno/Izu) end.[1]

Cars 3 and 6 each have one lozenge-type pantograph.[1]

The 7-car sets B1 to B7 (former Tamachi sets) are formed as follows, with car 1 at the south (Ueno/Izu) end.[1]

Cars 3 and 6 each have one lozenge-type pantograph.[1]

The 7-car "OM" sets based at Ōmiya were formed as follows prior to March 2013, with car 1 at the south (Ueno) end.[1] As of 1 April 2013, sets OM03, OM06, OM08, and OM09 remain unchanged.[1]

Cars 2 and 4 each have one lozenge-type pantograph.[1]

Between 23 June 1982 and March 1985, the 185-200 series trains were also used on special Shinkansen Relay shuttle services operating between Ueno in Tokyo and Ōmiya, the then southern terminus of the newly opened Tōhoku Shinkansen. These services ended in March 1985 when the shinkansen line was extended to Ueno.[4] Four sets were then transferred to Tamachi depot for use on Odoriko services. These sets were reformed with the Green car moved from car 6 to car 4, and were repainted with diagonal green stripes to match the 185-0 series sets based at Tamachi depot. A further three sets were transferred to Tamachi between 1988 and 1991, becoming sets B1 to B7.

Refurbished 7-car 185-200 series set on a Kusatsu limited express service in July 2008

Between 1993 and 1998, the original Japanese-style toilets in cars 1, 4, and 7 of the Tamachi-based B sets were replaced with western-style toilets.

The nine sets remaining at Shin-Maebashi depot were all refurbished between September 1995 and November 1996. Refurbishment involved replacing the original flip-over seating in standard-class cars with rotating/reclining seats. Externally, the sets were repainted in white with yellow/grey/red blocks intended to represent the Jōmō mountain range together with "EXPRESS 185" markings below the windows.

In March 2006, the Shin-Maebashi-based sets were transferred to Ōmiya depot, becoming sets OM01 to OM09.

Between March and June 1996, three of the 7-car sets based at Tamachi (B3 to B5) were fitted with ATC equipment for use on the Keihin-Tōhoku Line and Negishi Line when operating on Hamakaiji services. These sets were upgraded with D-ATC equipment between January 2006 and March 2007.

• 
  Standard-class seating in refurbished 185-200 series train in September 2006
• 
  Green-class seating in refurbished 185-200 series train in September 2006

Shōnan-liveried set OM03 in January 2012

In September 2010, 7-car set OM03 was repainted into the Shōnan colour scheme of orange and green (never previously carried by this type) to recreate the appearance of the early 80 series EMUs, as part of the 50th anniversary celebrations of the Kusatsu limited express service scheduled for October of that year.[5]

Sets A8 and C1 in original Odoriko livery in July 2012

In July 2011, 10-car Tamachi-based set A8 was repainted into the original Odoriko colour scheme of white with green diagonal stripes at Ōmiya Works.[6]

In June 2012, 5-car Tamachi-based set C1 was repainted into the original Odoriko colour scheme of white with green diagonal stripes at Ōmiya Works.[7]

Amagi-liveried set OM08 in April 2012

In February 2012, 7-car set OM08 was repainted into the JNR colour scheme of beige and maroon (never previously carried by this type) at Ōmiya Works to recreate the appearance of the early 157 series EMUs used on Amagi services.[8]