An article by
George Schmid in
Hosta Journal (1996 Vol. 27 No. 2) states that this
is an "old" incorrect name for Hosta
Mikiko Lockwood in an article on The Hosta Library titled,
A Little About Japanese Hosta Terms defines the term nakafu as medio-variegated.
are at least 3 hostas with this Japanese name but they are each of a different species as follows:
H. kiyosumiensis 'Nakafu' and
longissima var. longifolia 'Nakafu'.