Is the cut length going to be something along the lines of 10-18"? If so, there's not enough structure to a kataba like that - that's essentially a parts saw.
The saw used for sockets and dado work is called an azebiki. It looks kind of like a veneer saw, but works well for long cuts.
If the cut is just going to be the front end as shown in your picture and there's never going to be much length or depth, I think you would still enjoy a saw with a spine like the one shown in your picture. A kataba like you're showing is better for cutting ends off of smaller boards (where a spine may get in the way) unless it's a bigger saw.
I gave most of my japanese saws away a few years ago to a friend, or I'd just give you one of mine.