The Class DD16 (DD16形) is a four-axle Bo-Bo wheel arrangement diesel-hydraulic locomotive type operated in Japan since 1972.

A total of 65 locomotives were built between 1971 and 1975, and as of 1 April 2016[update], one locomotive remains in service, operated by East Japan Railway Company (JR East).

[1] Between 1979 and 1983, four locomotives (DD16 2, 5, 4, and 13) were converted at JNR's Nagano and Matto workshops to become self-propelled snowplough units, numbered DD16 301 to 304, with the addition of bogie snowplough units on either end.

[4] By 1 April 1995, seven locomotives were still in service, with four (DD16-0 and DD16-300) operated by East Japan Railway Company (JR East), two (DD16-0) operated by Kyushu Railway Company (JR Kyushu), and one (DD16-300) operated by West Japan Railway Company (JR West).

[3] As of 1 April 2016[update], one locomotive, DD16 11, remains in service, operated by JR East.