There is an image of this cultivar on the Hosta Library. From the photo on the HL website, it appears to be a large size hosta with golden yellow leaves which change to light green later in the season. The leaves are very pointed. It is a tetraploid sport of H. 'Liberty'. This non-registered cultivar was originated by Hugo Philips of Belgium.   

The MyHostas database says that "...'Kingin-rasha' could be the same..."