This 'Fortunei' type cultivar from Japan has been around for a very long time. It was registered by The American Hosta Society in 1987 as H. fortunei 'Aoki' but the name has been changed after the monograph, The Genus Hosta by W. George Schmid (1991), determined that there really was no species called H. fortunei.

'Aoki' forms a large size clump about 21 inches high with a spread of about 52 inches in width. The dark green to bluish green leaves have average substance and are not wavy or corrugated. Funnel shaped, pale lavender flowers are borne in late July.

According to The Hostapedia by Mark Zilis (2009), "...virtually indistinguishable from 'Fortunei Hyacinthina'."

Also from The Hostapedia: "The name H. fortunei 'Aoki' was registered by the AHS in 1987 for leaf show purposes (Eisel 1988, p. 60). When Hosta fortunei was no longer recognized as a species (Schmid 1991, p.50), the name H. 'Fortunei Aoki' was proposed for this plant (ibid, pp. 51 & 159). This was an awkward combination of a Latin specific epithet (fortunei) and a fancy name (Aoki). Instead, H. 'Aoki' makes more sense as a stand-alone name."