Waka poems were a popular art form in the Heian period, enough that the famous poet Fujiwara no Sadaie and Emperor Go-Toba sought to put together a selected collection of chosen verses.
A form of poetry passed down for 
a long time in Japan: Waka.
Por mucho tiempo en Japón,
se legó cierta forma de poesía: el waka.
Waka, uma forma de poesia
passada por gerações no Japão.