Dioscorea japonica
26th July 2009
I bought a small plant in spring when I was told that it was hardy (and I apologise to the grower, because I have forgotten who I got it from,
but it was at the Saville Gardens plant fair).
This year will be a good test for it! I have kept a couple of bulbils indoors in case I lose the adult plant.
24th September 2011
Decent autumn colour was a surprise, though I am sure it wouldn't have produced it outside (this one is groiwing in a pot).
31st August 2019
Found growing in Japan, Taiwan, Korea and China and occasionally used in Japanese cuisine.
There seem to be a number of different plants in cultivation under a range of names.