Natsume Sōseki , pen name Sōseki, born Natsume Kin'nosuke , was a Japanese novelist. He is best known for his novels Kokoro, Botchan, I Am a Cat, Kusamakura and his unfinished work Light and Darkness. He was also a scholar of British literature and writer of haiku and kanshi poetry and fairy tales.

Haiku is a type of short form poetry that originated in Japan. Traditional Japanese haiku consist of three phrases composed of 17 phonetic units in a 5, 7, 5 pattern; that include a kireji, or "cutting word"; and a kigo, or seasonal reference. However, haiku by classical Japanese poets, such as Matsuo Bashō, also deviate from the 17-on pattern and sometimes do not contain a kireji. Similar poems that do not adhere to these rules are generally classified as senryū.