This non-registered hosta from Japan is a form of H. pycnophylla. It becomes a medium size plant with gold colored foliage.

An article about name changes by W. George Schmid in The Hosta Journal (1996 Vol. 27 No. 2) states that, "The Latin name of the species may be omitted, because the cultivar name already includes the vernacular Japanese name of the species. Thus, H. pycnophylla 'Ogon Setouchi' may be abbreviated to H. 'Ogon Setouchi' or H. longipes 'Urajiro Iwa' may be shortened to H. 'Urajiro Iwa'..."

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 and the term urajiro as white-backed or white underside, the term ogon or oogon as gold or yellow. and the term ogon or oogon as gold or yellow.