This is one of those cases where there are two hostas with the same name. One is registered and, therefore, the "official" version of H. 'Ginbuchi Tachi' while the other is a non-registered plant and needs to be renamed to avoid further confusion.

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term ginbuchi as silver edge(d) or white edge(d) and the term tachi as upright, 'Tachi Gibōshi' or H. rectifolia.

This cultivar of unknown originator and parentage from Japan was registered by Peter Ruh of Ohio in 2002 and re-registered with new data in 2018. It grows into a medium size hosta about 12 inches in height with a spread of 22 inches. The leaves are medium green with stable lighter green streaks on the edge and creamy yellow marginal variegation. They are lanceolate, flat, slightly shiny on the top and very shiny on the bottom. Pale lavender flowers bloom on scapes 25 to 27 inches tall  from August into September followed by viable seeds..

The registration materials state: "...long petioles; attractive leaves..."

Hosta Helper will call this plant 'Ginbuchi Tachi' (Ruh)

This was originally registered as a sport of the species H. rectifolia but that was changed to Parentage Unknown in 2018.

According to The Hostapedia by Mark Zilis (2009), "...there has been some confusion surrounding the name 'Ginbuchi Tachi'...at least two plants have been known as 'Ginbuchi Tachi'. The registered type is most likely the same as 'Chionea' and resembles 'Ginko Craig'...the plant pictured in Variegated Plants in Color...is not the same as the registered plant, instead being a white-margined version of the gold-edged H. rectifolia 'Kinbuchi Tachi'."

This cultivar which was originated by Kimio Muroya of Japan and is marketed by Mark Zilis of Q & Z Nursery formerly of Illinois under the trade name Hosta SILVER STAR™.

Mikiko Lockwood in an article on The Hosta Library titled, A Little About Japanese Hosta Terms defines the term kinbuchi as gold-edged or yellow edged.

Hosta Helper will call this plant 'Ginbuchi Tachi' (Muroya)

If you are not thoroughly confused about this cultivar by now, you are lucky or a major hostaphile. From what I can determine, I think the plant shown above is actually the one that Mark Zilis has seen in Japan and not the one described by the registration information. At least that is my guess.