, the fleet consists of 108 vehicles, formed as 27 four-car sets.
811-0 series
The four-car 811-0 series sets are formed as follows.
Designation
M'c
M
T
Tc'
Numbering
KuMoHa 810
MoHa 811
SaHa 811
KuHa 810
Capacity
48/124
56/133
56/133
44/123
The KuMoHa 810 car is fitted with one PS101Q lozenge-type pantograph. The KuHa 810 car has a toilet.
811-100 series
The four-car 811-100 series sets are formed as follows.
Designation
M'c
M
T
Tc'
Numbering
KuMoHa 810-1xx
MoHa 811-1xx
SaHa 811-1xx
KuHa 810-1xx
Capacity
48/133
56/141
56/141
44/131
The KuMoHa 810 car is fitted with one PS101Q lozenge-type pantograph. The KuHa 810 car has a toilet. Sets PM105 and PM106 have SaHa 811-200 cars instead of SaHa 811-100 cars. These also have a toilet.
811-1500 series
The four-car 811-1500 series sets refurbished from former 811-0 series sets are formed as follows.
Designation
M'c
M
T
Tc'
Numbering
KuMoHa 810-15xx
MoHa 811-15xx
SaHa 811-15xx
KuHa 810-15xx
The KuMoHa 810 car is fitted with one single-arm pantograph. The KuHa 810 car has a toilet.
Interior
The 811-100 series sets have fixed transverse seats in the vicinity of the doorways rather than the flip-over seats of the 811-0 series sets.
Livery variations
Sets P8 and P9 carried a "Mitsui Greenland" promotional livery, and set P11 carried a "Space World" promotional livery for a while. As of January 2013, P8 carries promotional vinyls for the Kyushu Heritage Museum, and the other two sets have been returned to the standard colour scheme.
History
The first sets were delivered in June 1989, and entered service from 21 July 1989. Trains became all no-smoking from 1 September 1995. 11 811-100 series four-car sets were delivered from 1992, numbered PM101 to PM111. These had a modified seating arrangement to provide more standing space in the doorway areas.
Refurbishment
In 2017, set PM4 was refurbished, renumbered as set PM1504. Refurbishment changes include replacing the traction control equipment with SiC-VVVF equipment, changing to a single-arm pantograph, tinted passenger windows, full-colour LED destination indicators, and replacement of the former transverse seating with longitudinal bench seating. The interior and exterior design for refurbished trainsets was overseen by the industrial design company Don Design Associates. The first refurbished trainset returned to service in April 2017.
