Waka is a traditional form of Japanese poetry that dates back to the 7th century. It consists of 31 syllables arranged in a specific pattern: five syllables in the first line, seven in the second and third lines, and five in the fourth and fifth lines. Waka often expresses themes of nature, love, and the changing seasons, reflecting the beauty and transience of life. There are several variations of waka, including tanka, which is a more modern form that maintains the same syllable structure. Waka has played a significant role in Japanese literature and culture, influencing many poets and writers throughout history.