Rantei Kyokusui is a sake brand whose name references the classical Japanese poetic gathering kyokusui no en, in which participants compose verse while floating sake cups down a winding stream. The brand is associated with Akagi Shuzo and offers products including a nama-chozo (cold-stored unpasteurized) style and a kuradashi genshu (cellar-released undiluted) version. Production details and brewery origin records are limited in publicly available sources.