What is a tanku poem?

A tanku is a short form of poetry that combines elements of haiku and tanka. It consists of five lines with a set syllabic pattern of 5-7-5-7-7. The tanku often explores a single theme or image, providing a brief and evocative glimpse into a moment or experience. Its concise structure encourages poets to capture the essence of a subject in a few deft brushstrokes.