This non-registered cultivar of the H. longipes type originated by Kenji Watanabe of the Gotemba Nursery in Japan. It is a medium size plant with green foliage that has creamy yellow marginal variegation with some streaks in the center. It has purple red petioles.

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term nishiki as brocade (rich-colored woven fabric) i.e. something colorful and beautiful and the term yama as mountain.