This cultivar is part of the "Rosedale Series" of hostas from Jerry Hadrava of Iowa. It is a hybrid of H. 'Allan P. McConnell' × H. 'Yakushima Mizu' which grows into a small size mound about 10 inches tall by 29 inches wide. The lance shaped leaves are wavy and have thick substance.

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.