Not to defend the above photos of Yoshiaki but all bonsai tools are 'bendable' on the handles, up to the blade area. They are recommended to cut (NO.16 Masakuni for example) only 1/2 the length of the blade. This means: Don't try to cut a branch that is at more than half the length of the blade. Also the blades are usually heat treated to a 'depth' (meaning they core of the blade is still soft) Also, they definitely can break a blade on a No.16 if you're cutting DEAD wood. It is dry , it is hard and it will chip a blade and possibly BEND the entire handle causing miss alignment at the blade.
I know that yes Masakuni which I used to sell 50yrs ago, is the finest yet I had customers come back from my club and show me "abused" tools. Abused meaning: they ground and pounded the hell out of the tools and destroyed the integrity of them! Never let a unskilled person sharpen your tools. Learn to do it yourself!
PS, the shears all of them, No 1, 2, 28, etc should have a tiny bit of 'play' in the rivit. This means that it is not tight. I had a fellow pound the rivit down so tight you could barely open the shear....he came back and said they were defective! Hah! So he proceeded to 'correct' them.....LOL! What an idiot!
The one thing you need to know: Masakuni and most all fine Japanese brands are High Carbon Steel. Usually something close M7. ( High Speed Cobalt tool steel is M14 and it is harder than the hammer of hell...brittle too!) Bonsainut has an idea here worth considering: Tungsten Carbide surgical shears....don't know their cost but also brittle if dropped.
The blade itself should Rockwell out around 55-58 for High carbon tool steel. Masakuni and others...including J.Roth.
Your fine hunting knife is the same material and hardness.
Stainless is another story altogether! Softer and need of constant sharpening......nice but not that nice...
Further, the No. 16 (style) above that Brian shows is what is known as a mandible cutter. One blade overlaps the other. However I'd like to know if they arrived in this condition or did it simply 'bend'.....and if they did bend, what was the reason? Severe pressure will cause the handles to be distorted causing misalignment of the faces of the blades.
Nuff said.
vance hanna