renga
/ˈreŋgə/noun
(复同单, 或 rengas)
- a Japanese poem in the form of a tanka (or series of tanka), with the first three lines composed by one person and the second two by another.日本五行诗（前三行与后两行分人写作）
词源
Japanese, from ren 'linking' + （from ka 'poetry'）.