According to The Hostapedia by Mark Zilis (2009), "H. 'Kofukiwa Iwa' = H. longipes hypoglauca... the common name for H. longipes hypoglauca, "Kofuki Iwa Gibōshi"."

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 kofuki as glaucous.