What is Haiku?A haiku poem has three lines, where the first and last lines have five moras, while the middleline has seven. The pattern in Japanese genre is 5-7-5. The mora is another name of a sound unit, which is like a syllable, but it is different from a syllable. As the moras cannot be translated into English, they are modified and syllables are used instead. The lines of such poems rarely rhyme with each other.