This non-registered cultivar is a sport of H. longissima from Japan of unidentified origin . It is a small size plant with green, strap-like foliage which has a white marginal variegation. Flowers are medium purple in color with purple anthers and are borne from mid-September to October.

"Hanazawa Mizu Gibōshi, the "margined swamp hosta" is a white-margined sport of the species (H. longissima) found growing in the wild in Shimoyama."

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.