Of unidentified origin, this non-registered cultivar is a sport of
longissima. It is a small size hosta with green
foliage that has a white marginal variegation.
The Hostapedia by Mark Zilis (2009), "...possibly the same as H. longissima 'Hanazawa
Fukurin Mizu' or H. longifolia 'Fukurin
Mikiko Lockwood in an article on The Hosta Library titled,
A Little About Japanese Hosta Terms defines the term hosoba
as narrow leaf and the term mizu as water, 'Mizu Gibōshi' or
H. longissima and the term fukurin as margined or edged.