Originated in Japan, this non-registered cultivar is a sport of
montana. It forms a large size hosta with
green foliage that has yellow streaked variegation.
The Hostapedia by Mark Zilis (2009),
"Don't confuse 'Shuho Nishiki' with 'Shunko Nishiki'. Both are
variegated sports of Hosta montana, but 'Shuho Nishiki'
has streakier foliage."