On the following pages you will find Tantos which I have for sale. A Tanto 短刀 is a knife or dagger. Most Tantos have a cutting edge, but there are also Tantos with two cutting edges. Better known under the name Ken (剣), a straight double-edged sword. The length of the Tanto is generally no longer than 30 cm. Note: The cutting edge of the sword determines the length of the blade.