Just a bit of info, Hitachi shiro-gami steel (white paper) is as close to tamahagane as you can get in a commercially produced steel, 1%C and very little else with no V in it either. Extremely fine grained which is excellent for razor use. It will also perform as well as tamahagane for less money, but not a whole lot less. Any steel with low Vanadium should work just fine and last you years, provided you don't go crazy with the hones. Vanadium produces very large carbides that prohibit a very fine edge, like a kamisori (or any razor) needs, but works well in more obtuse applications like knives and such.
I'm making a couple kamisori now from 1084 steel and I expect them to outlast me! Its one of my favorite steels, it is the eutectoid steel which makes grain refinement super easy and HT is near impossible to mess up!
A barber learns to shave by shaving fools.