The Kōun Senshu (耕雲千首) is a Japanese anthology of waka poetry. It contains 1,000 poems written by Kazan'in Nagachika, also known as Kōun, who presented it to the Southern Court in Yamato Province in the spring of 1377, having been unable to do so the previous year due to illness. Nagachika was in his twenties when he composed the poems.
Authorship and date
In 1376, the Southern Court had had a 1,000-waka fete at the palace. Six people had made entries: Emperor Chōkei, Prince Hironari (春宮熙成親王), the kanpaku Nijō Noriyori (関白二条教頼), Fujiwara no Morokane (藤原師兼), Fujiwara no Tsunetaka (藤原経高) and Prince Munenaga. Munenaga also appraised the work of the other five.
Nagachika, who had been absent from court due to illness, presented his 1,000 poems the following year.
The manuscript currently in the possession of the Archives and Mausolea Department of the Imperial Household Agency (formerly owned by the estate of Nobutsuna Sasaki) contains a long and detailed prose work of poetic criticism written by Prince Munenaga and addressed to Nagachika.