Poetry Japanese formal poetry (which was generally referred to as "waka"), and was used more heavily to explore personal rather than public themes. By the tenth century, tanka had become the dominant form of Japanese poetry, to the point where the originally general term "waka" ("Japanese poetry") came to be used exclusively for tanka. Tanka are still widely written today. Haiku is a popular form of unrhymed Japanese poetry, which evolved in the 17th century from the "hokku", or opening verse of a renku. Generally written in a single vertical line, the haiku contains three sections totalling 17 "onji", structured in
Haiku in English the one-line form can create a variety of ambiguities involving the perceived placement of cuts and the grammatical status of individual words, thereby allowing for multiple readings of the same haiku. A variation of the format breaks the line at the "caesura" or pause. At its most minimal, a single word may occasionally be claimed to be a haiku: The first was printed alone on an otherwise blank page and arguably only "works" in that context. The second example is an allusion to the first and also depends on its placement at the center of a haiku collection. Haiku of