Uta monogatari (歌物語, literally "poem-tale") is a literary subgenre of the monogatari. It is characterized by an emphasis on waka poetry, with prose sections interspersed. While most other monogatari of the Heian period and later contain waka, the uta monogatari feature poetry as the core of successive narrative episodes, with the prose sections sometimes limited to a brief note about the composition of the poetry. Source: Wikipedia (en)