Koko-dana was created by Gengensai, based on the Sanju-dana. Koko literally means favored again. This name describes that the Sanjo-dana was Rikyu’s Konomi and when Gengensai removed one shelf and changed the wood type to cedar — the old favorite of Rikyu became favored again.
The first Koko-dana was in cedar in Kiji style, but later Gengensai created the black lacquer one, with red edges on the shelves. This is by far the most common Koko-dana today.
Koko-dana is 52 cm high, and each of the shelfs are 30.4 x 30.4 cm.