The traditional Japanese form of poetry consisting of three lines is called a haiku. Haikus have a specific structure of 17 syllables in total, usually arranged in three lines of 5, 7, and 5 syllables. This poetic form often focuses on nature, seasonal changes, or moments of beauty and reflection. Haikus aim to capture a brief, poignant moment and convey deep emotions or insights in a succinct manner. The artistry lies in their ability to evoke vivid imagery with minimal words, making it a unique and cherished form of expression in Japanese literature.