Looks like there's indeed some kind of connection between Masahiro and Spyderco then.
They sell the Masahiros at a Norwegian hardware store chain. Straight up kitchen knives with full tang and black pakkawood scales, and there are at least 2 models with the SpyderEdge. The serrated one I have is a 21 cm chef's knife that I mainly use for cutting bread. Best bread knife I ever tried, even though I suspect it's not what it's designed for.
The blades don't say anything about steel quality other than "Molybdenum Vanadium Stainless Steel". The edge (on the plain edge knives) is not quite chisel ground, but is most definitely asymmetric.