# 811 series

The 811 series (811系) is an AC electric multiple unit (EMU) train type operated on local services by Kyushu Railway Company (JR Kyushu) in Japan since 1989.

## Variants

* 811-0 series: 16 x 4-car sets (PM1–17)
* 811-100 series: 11 x 4-car sets (PM101–111)
* 811-1500 series: Refurbished 4-car sets (PM15xx)

## Design

The trains were built jointly by Hitachi, Kinki Sharyo, and JR Kyushu (Kokura factory).

## Operations

811 series trains are used on "Local" (all-stations) and "Rapid" (limited-stop) services on the following lines.
* Kagoshima Main Line
* Nagasaki Main Line
* Nippo Main Line

## Formations

As of 1 October 2017, the fleet consists of 108 vehicles, formed as 27 four-car sets.

### 811-0 series

The four-car 811-0 series sets (sets PM1 to PM17) are formed as follows.
| Designation | M'c | M | T | Tc' |
| Numbering | KuMoHa 810 | MoHa 811 | SaHa 811 | KuHa 810 |
| Capacity (Seated/total) | 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 (sets PM101 to PM111) are formed as follows.
| Designation | M'c | M | T | Tc' |
| Numbering | KuMoHa 810-1xx | MoHa 811-1xx | SaHa 811-1xx | KuHa 810-1xx |
| Capacity (Seated/total) | 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 (sets PM15xx) 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.
* The interior of 811-0 series set PM11 in November 2008
* The interior of 811-100 series car KuHa 810-106 of set PM106 in November 2006
* The interior of refurbished 811-1500 series car MoHa 811-1504 of set PM1504 in September 2017

## 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.
* Set P9 in Mitsui Greenland livery in April 2006
* Set P11 in Space World livery in September 2006
* Set P8 in promotional livery in April 2011

## 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.