Chef's knife / Gyuto / Santoku
A good chef's knife is the basic tool for every chef and hobby chef.
Chef's knives have a high blade so that you can put the fingers of the hand holding the food against the side of the blade. In this way you can work safely and very quickly.
Most home cooks choose an 18-20cm blade, which is long enough to cut large quantities in one stroke. Professional chefs usually choose a 23-26cm blade.