There is an image of this
cultivar on the
Hosta Library. From the photo on the HL website, it appears to be a very
slow growing, miniature
size hosta with dark green leaves. The petioles are
covered in reddish dots which extend up into the base of
the leaf blade. This non-registered cultivar was
originated in Japan by Suzuki.
George Schmid (1991) describes a Rasha leaf as one that
is a "Uniquely contorted leaf with an unevenly knotty
and knurled surface texture".