The Hostapedia by Mark Zilis (2009), "The name 'Ōgon Koba' represents somewhat of a confusing
situation. It has become a "catch-all" cultivar name for any
gold-leaved form (seedling or sport) of
Mikiko Lockwood in an article on The Hosta Library titled,
A Little About Japanese Hosta Terms defines the term koba as small leaf,
'Koba Gibōshi' or
H. sieboldii and the term ogon or oogon as gold or yellow.