A sharp knife is important to cut smoothly the meat, vegetables, etc. Speaking of food quality, when we cut we are actually crushing the cells of the vegetables. We can prevent this with a sharp knife. In this way we damage as less as possible the cells of the vegetable during the cutting process. This way you can keep your vegetables much longer for storage. Japanese whetstones can make your knife razor sharp. Always soak your Japanese whetstone in water before using it.