Taiga drama (Japanese: 大河ドラマ, Hepburn: Taiga dorama, "Big River Drama") is the name NHK gives to the annual year-long historical drama television series it broadcasts in Japan. Beginning in 1963 with the black-and-white Hana no Shōgai, starring kabuki actor Onoe Shoroku II and Awashima Chikage, the network regularly hires different writers, directors, and other creative staff for each taiga drama. The 45-minute show airs on the NHK General TV network every Sunday at 20:00, with rebroadcasts on Saturdays at 13:05. NHK BS Premium and NHK World Premium broadcasts are also available.

Taiga dramas are very costly to produce. The usual procedure of a taiga drama production would have one-third of the total number of scripts finished before shooting begins. Afterwards, audience reception is taken into account as the rest of the series is written. Many times, the dramas are adapted from a novel (e.g. Fūrin Kazan is based on The Samurai Banner of Furin Kazan). Though taiga dramas have been regarded by Japanese viewers as the most prestigious among dramas in Japan, viewership ratings have considerably declined in recent years.