Found the composition of V-gin 1, 2, and 3B on the Japanese site
V-gin2 is .85-.95% C and 7-8% Cr
V-gin1 is .95-1.05% C, 4.5-5.5% Cr, .8-1.2% Mo, an .2-.5% V (interestingly Ni content is not included in the Japanese version)
Also, the Japanese website says that soft stainless clad with VG1...