I see; thank you for pointing that out. And I apologize for this late response.
To that, if guns are as regulated in America as Japan, then i wager that the violent crime rate would not decline. Gun are the most effective means of killing, but it is by no means the most destructive and frightening.
A knife is an extremely simple tool and yet can almost be just as lethal and scary. Here's why.
Due to its simplicity, it can be made cheaply. A handgun on average cost roughly $500 to a knife that can be purchased at maybe $7. Or take any crap metal that can be found almost anywhere and sharpen it to a fine edge.
It is much smaller, much lighter in weight, and have a naturally thin profile which means it far easier conceal than comparatively bulky, 3-5 pound handgun .
Unlike a handgun you cannot hear it when used, except the gasp, screams, cries, and moans of the victim.
You do not have the reach advantage of a gun, but committing a murder is as easy as simply approaching a victim from the front and rear in the dark.
And while the knife is far slower than a bullet, the damage it can inflict is arguably more. WIth a stab, if you pull it it will cause more damage because the flesh bonds to the blade so if you pull out you would cause more damage. The bullet in comparison, depending on what type, simply passes through.
Now with a cut, it's damage depends on depth. the deeper it goes, the more damage it inflict, as well as lethality.
And in speaking of lethality, the lethality of the bullet depends entirely on what's called "Shot Placement". If a bullet hits anywhere on the arms and legs it is generally non-lethal unless it severs an artary. Where it is lethal is the head, neck, and chest area.
With the knife it is almost a reverse (depending on the depth and angle of the cut). Anywhere in the body where there is an artery which are above the hand, the knees, anywhere on the neck, and the stomach. Obviously the chest area is better protected, but a stab in that area is almost always lethal.
Medically, you can plug up a gunshot wound with a gauze patches; but with a deep cut you need a lot more of it depemding on length. And again you cannot pull out the knife, you just have to wrap gauze around it as only the surgeons can free the blade and place a cup with the right measurement over the knife so that it is better protected from bumps.