This non-registered cultivar is a form of the species H. longissima from Japan. The plant becomes a small size (6 inches high by 9 inches wide) mound with narrow foliage which has a shiny on top and bottom. The green leaves have gold marginal variegation and are narrowly elliptic (strap-shaped), smooth textured without waves. It has average substance. Flowers are medium purple in color with purple anthers and are borne from mid-September into October.

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term mizu as water, 'Mizu Gibōshi' or H. longissima and the term fukurin as margined or edged.