| KiHa 181 series | |
|---|---|
 KiHa 181 series on a Hamakaze service, August 2009 | |
| In service | 1968–December 2010 |
| Manufacturer | Fuji Heavy Industries, Niigata Tekkō, Nippon Sharyo |
| Replaced | KiHa 80 series |
| Constructed | 1968–1972 |
| Number built | 158 vehicles |
| Number in service | None |
| Number preserved | 3 vehicles |
| Successor | KiHa 187 series, KiHa 189 series |
| Operators | JNR (1968–1987) JR-West (1987–2010) JR Shikoku (1987–1993) Myanmar Railways (2013–present) |
| Specifications | |
| Car body construction | Steel |
| Car length | 21,300 mm (69 ft 11 in) |
| Width | 2,903 mm (9 ft 6.3 in) |
| Height | 3,955 mm (12 ft 11.7 in) |
| Doors | One per side |
| Maximum speed | 120 km/h (75 mph) |
| Prime mover(s) | DML30HSC |
| Power output | 500 hp (at 1600 rpm) |
| Transmission | Hydraulic |
| Bogies | DT40B (driving), TR219B (trailing) (formerly DT36B (driving), TR205B (trailing)) |
| Braking system(s) | Engine brake, CLE brake |
| Safety system(s) | ATS-S |
| Track gauge | 1,067 mm (3 ft 6 in) |
The KiHa 181 series (キハ181系, Hyaku-hachijūichi-kei) was a diesel multiple unit (DMU) train type operated in Japan on limited express services between 1968 and 2010. Initially introduced by Japanese National Railways (JNR), the trains were later operated by West Japan Railway Company (JR-West) and Shikoku Railway Company (JR Shikoku) following privatization in 1987.