The Man'yōshū (万葉集?, literally "Collection of Ten Thousand Leaves", but see Name below) is the oldest existing collection of Japanese poetry, compiled sometime after 759 AD during the Nara period. The anthology is one of the most revered of Japan's poetic compilations. The compiler, or the last in a series of compilers, is today widely believed to be Ōtomo no Yakamochi, although numerous other theories have been proposed. The last datable poem in the collection is from AD 759 (#4516). It contains many poems from much earlier, many of them anonymous or misattributed (usually to well-known poets), but the bulk of the collection represents the period between AD 600 and 759. The precise significance of the title is not known with certainty.
The collection is divided into twenty parts or books; this number was followed in most later collections. The collection contains 265 chōka (long poems), 4,207 tanka (short poems), one tan-renga (short connecting poem), one bussokusekika (poems on the Buddha's footprints at Yakushi-ji in Nara), four kanshi (Chinese poems), and 22 Chinese prose passages. Unlike later collections, such as the Kokin Wakashū, there is no preface.
The Man'yōshū is widely regarded as being a particularly unique Japanese work. This does not mean that the poems and passages of the collection differed starkly from the scholarly standard (in Yakamochi's time) of Chinese literature and poetics. Certainly many entries of the Man'yōshū have a continental tone, earlier poems having Confucian or Taoist themes and later poems reflecting on Buddhist teachings. Yet, the Man'yōshū is singular, even in comparison with later works, in choosing primarily Ancient Japanese themes, extolling Shintō virtues of forthrightness (真 makoto?) and virility (). In addition, the language of many entries of the Man'yōshū exerts a powerful sentimental appeal to readers: