This plant is touted as a classic rock garden size hosta that came from Japan and is not registered. It forms a small size (6½ inches high by 14 inches wide) mound with wavy leaves. The lavender flowers are borne in late August followed by viable seeds.

The New Encyclopedia of Hostas by Diana Grenfell (2009) states in its Miniature Hostas chapter: "Suitable for an edging along a raised border. Probably a form of H. gracillima..."

"Plant from Yaku Island which is notable for the occurrence of scarce dwarf forms of a number of different genera. Japanese nursery operators use "Yaku" or "Yakushima" in the descriptors for small plants to imply scarcity. The plants most commonly grown under this name are forms of H. gracillima...Most Japanese authorities consider this an incorrect name."

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.

An article by Akira Horinaka in The Hosta Journal (2006 Vol. 37 No. 1) says,  "...'Yakushima Otome' was hybridized by Mr. Kitahara...in Tokyo. It was produced from H. venusta...and 'Komame', a very small form of H. 'Yakushima Mizu' found in Kyushu."

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term otome as maiden, 'Otome Gibōshi' or H. venusta.