紀貫之
The Japanese preface by Ki no Tsurayuki is also the beginning of Japanese criticism as distinct from the far more prevalent Chinese poetics in the literary circles of its day. The anthology also included a Classical Chinese preface authored by Ki no Yoshimochi. The idea of including old as well as new poems was another important innovation, one which was widely adopted in later works, both in prose and verse. The poems of the "Kokinshū" were ordered temporally; the love poems, for instance, though written by many different poets across large spans of time, are ordered in such a way that the reader may understand them to depict the progression and fluctuations of a courtly love-affair. This association of one poem to the next marks this anthology as the ancestor of the "renga" and "haikai" traditions.