This non-registered cultivar from northern Japan is of unidentified parentage. It is a miniature size hosta with lanceolate, wavy, shiny medium green colored foliage and bears lavender flowers. The leaves are shiny with prominent veins.

According to The Hostapedia by Mark Zilis (2009), "...appears more like a form of H. sieboldii than H. longipes. .."

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term iwa as rock, Iwa Gibōshi or H. longipes.