kireji

are a special category of words used in certain types of Japanese traditional poetry. It is regarded as a requirement in traditional haiku, as well as in the hokku, or opening verse, of both classical renga and its derivative renku (haikai no renga). There is no exact equivalent of kireji in English, and its function can be difficult to define. It is said to supply structural support to the verse. When placed at the end of a verse, it provides a dignified ending, concluding the verse with a heightened sense of closure. Used in the middle of a verse, it briefly cuts the stream of thought, indicating that the verse consists of two thoughts half independent of each other. In such a position, it indicates a pause, both rhythmically and grammatically, and may lend an emotional flavour to the phrase preceding it.

== List of common kireji == Classical renga developed a tradition of 18 kireji, which were adopted by haikai, thence used for both renku and haiku, the most common of which are listed below: (): emphasis; when at end of a phrase, it indicates a question (): emphasis; usually can be found at a poem's end, indicates wonder (): exclamatory verbal suffix, past perfect or (): verbal suffix indicating probability (): adjectival suffix; usually used to end a clause (): verbal suffix; present perfect (): emphasises the preceding word or words. Cutting a poem into two parts, it implies an equation, while inviting the reader to explore their interrelationship.