The KiYa 143 (キヤ143形) is a four-axle B-B wheel arrangement diesel-hydraulic locomotive type operated in Japan since 2014 by West Japan Railway Company (JR West).

The KiYa 143 locomotives are used as self-propelled snowplough units during the winter season, replacing ageing JNR Class DD15 and JNR Class DE15 locomotives, and for hauling non-revenue services during other periods with the snowploughs removed.

[1] The KiYa 143 locomotives use the same 450 hp (340 kW) diesel engines and braking systems as JR West's KiHa 189 series diesel multiple unit (DMU) trains.

[3] As of 1 April 2017[update], nine KiYa 143 locomotives were in operation, allocated as follows.

[4] While technically a diesel locomotive, the KiYa 143 is classified by JR West according to its diesel multiple unit (DMU) numbering scheme.