If you have a Japanese knife, consider a saya. While you can use a blade guard on Japanese knives such as gyuto, santoku, and nakiri, among others, you might want to invest in a saya instead. Sayas are wooden sheaths made specifically for Japanese knives. They cover a knife’s entire blade and are secured with a wooden pin that essentially buckles the blade into the sheath. Some Japanese knives come with their own dedicated sayas, but you can also buy generic sayas in different sizes at most shops that specialize in Japanese knives. Most shops that sell Japanese knives (including Korin, Bernal Cutlery, and Chef Knives To Go) will help you fit the right saya to your blade and make adjustments to the saya as needed. If you can, try to ensure that the saya fits your knife before you buy it. You can do this in person, or, as Wendy Yang from Korin mentioned, you can send in your knife to certain shops for sharpening and have it sized for a guard then. If you have a knife that’s got a particularly unusual shape or size, some shops will even help you get a custom saya. Sayas are generally more expensive than guards or cases, though; depending on the design and type of wood used, a saya will cost anywhere from about $15 to about $50.