The new chisels are Kakuuchi Oiirenomi vs. the more common Mentori Oiirenomi. The biggest difference is the hard steel extends up the side of chisel and there is no bevel on the sides much like a western firmer chisel.
A photo of the two bevels, the Kakuuchi chisel on the right has not been sharpened so it is a little duller looking.
mentoriKakuuchiBevel.jpg
In this photo and the next you can see the bevel of the Mentori vs. no bevel on the Kakuuchi chisel.
mentoriKakuuchiTop.jpg
The two chisels from the side.
mentoriKakuuchiSide.jpg
I do not like to work more than a chisel or two at a time so I expect it will be a couple of weeks before they are ready for use.
ken