Means 'three virtues' and has Japanese historical significance.
The word Santoku defines the style and design of a culinary knife, which could be compared to a small narrow-bladed cleaver, usually with a 5" to 7" blade length and a granton edge. The Santoku-designed knife is very comfortable and well-balanced. Kept sharpened, and well-cared for, a Santoku is a dream knife to keep in the kitchen.
Read more about Santoku knives:
What is a Santoku Knife?
Santoku Knives - Why Are They So Popular; Does A Santoku Replace Other Knives?
Super Slicing With a Santoku Knife
Basic, Simple Knife Care and How to Use a Knife Steel
Thomas Rosenthal Group Santoku Knife Review
Santoku knives are quite popular because they are extremely sharp and terrific for chopping, dicing and mincing. They are either sold alone, or are included in cutlery sets. See What is a Santoku Knife? for more detail about these knives.