Japanese poetry is based on alternating a certain number of syllables. There is no rhyme, but much attention is paid to the sound and rhythmic organization of the poem. Haiku, or haiku (opening verses), is a genre of Japanese poetry: an unrhymed tercet of 17 syllables (5+7+5). The art of writing haiku is, first of all, the ability to say a lot in a few words. Genetically, this genre is related to tanka. Tanka (short song) is the oldest genre of Japanese poetry (first recorded in the 8th century). Unrhymed five-line verses of 31 syllables (5+7+5+7+7). Expresses a fleeting mood, full of understatement, distinguished by poetic grace, often with complex associativeness and verbal play.