Kodachi appear to have been produced only in a certain time period by specific schools of sword makers.

"Do you know the history of the sword maker himself?"

Each sword maker had his own methods of forging, and they produced a consistent pattern.

Let the sword makers throw away and disown their weapons.

The sword maker agreed, but told the Samurai it would take a year to make.

He was a great sword maker, my father.

He took for his woman a thin girl whose father was a sword maker; she had a singing voice and a lazy glance.

You are the greatest sword maker, you deserve to come first.

"You are a sword maker," came the booming voice.

"Who could pity the greatest sword maker in the history of the world?"