There is an image of this
cultivar on the
Hosta Library. From the photo on the HL website, it appears to be a small
size hosta with light yellowish-green leaves and darker
green, irregular marginal variegation. This non-registered cultivar was
originated in Japan.
Waisei Gibōshi, the "dwarf-growing gold hosta" is
H. sieboldii 'Kabitan' under a fancy Japanese
Mikiko Lockwood in an article on The Hosta Library titled,
A Little About Japanese Hosta Terms defines the term ogon or oogon as gold or yellow.