Japan, Yamanashi ken (山梨県), Koshu (甲州) (home of the Koshu grape).
I think that Mas Daumas de Gassac is planted on volcanic soil
Greco di Tufa of course. Tuff is a bit different than your dark volcanic flow, since it is a hot air borne ash that then accumulates into something with a different texture than a volcanic flow rock (like a basalt)…