An article by W. George Schmid in The Hosta Journal  (1996 Vol. 27 No. 2) states that This is a duplicate, incorrect or outdated name for Hosta kiyosumiensis 'Nakafu Kiyosumi'.

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term nakafu as medio-variegated.

There are at least 3 hostas with this Japanese name but they are each of a different species as follows: H. cathayana 'Nakafu', H. kiyosumiensis 'Nakafu' and H. longissima var. longifolia 'Nakafu'.