microbevels are intended to achieve the following things (not necessarily all of them, but at least one, if not a combination of a couple or more):
-maintaining extremely thin geometry on a knife that could not otherwise handle it
-reduce chipping in super hard steels
-increase stability in larger carbide steels (especially at low sharpening angles)
-improve edge retention at a cost of maximum sharpness
The tojiro is a medium hardness version of white #2...