A saijiki (歳時記, lit. "year-time chronicle") is a list of Japanese kigo (seasonal terms) used in haiku and related forms of poetry. An entry in a saijiki usually includes a description of the kigo itself, as well as a list of similar or related words, and some examples of haiku that include that kigo.[1] A kiyose (季寄せ) is similar, but does not contain sample poems. Modern saijiki and kiyose are divided into the four seasons and New Year, with some containing a further section for seasonless (無季, muki) topics. Each seasonal section is further divided into a standard set of categories, each containing a list of relevant kigo. The most common categories are the season, the heavens, the earth, humanity, observances, animals and plants.