This is a sport of the species, H. kikutii polyneuron and is a non-registered variety from Shikoku Island in Japan. It forms a medium size mound of streaked foliage with leaves that are narrowly elliptic. Lavender flowers bloom from August into September.

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term -gawa or -kawa as river.