Tanka and Renga Chains
A tanka is a poetic form that is built on the haiku. The haiku’s 5-7-5 syllable structure forms the beginning of the tanka. A second poet then responds with a 7-7 couplet, completing the tanka.
A renga chain is a sort of ongoing tanka, where a string of poets can respond to one another. For fun, I started a blogging renga chain some months back. It has been fun watching the chain lengthen out over the months. Every now and then, someone comes along and adds another link.