According to The Hostapedia by Mark Zilis (2009), "H. montana 'Chirifu Tochigi' = H. montana 'Chirifu Oba'."

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term chirifu as speckled, mottled or overall variegated and \the term oba or ooba as large leaf, 'Oba Gibōshi' or H. montana.