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Stainless steel knives are considered low maintenance, easier than both stainless clad and iron clad to care for.
Stainless steel Japanese knives are made in a process called “Sanmai” or “Forge welding” where two softer layers of stainless steel are laminated around a harder core layer of stainless steel. All three of these layers are rust resistant and therefore are not susceptible to rust or discoloration. The softer outer layers of steel are used to make the knife more durable and flexible while the harder core layer is used to provide better edge retention to the blade.
Japanese stainless steel is special because of the added carbon content, which provides better edge retention than standard stainless steel. That said, they do not have the same edge retention or ease of sharpening as carbon steels. If you want a stainless steel that is more comparable to carbon steel, higher quality stainless super steels such as R2/SG2, HAP40, and Cobalt Special, are best; however, these tend to be more expensive.
Stainless steel is a great place to start if you're just getting into cooking or Japanese knives. As the name implies, these are very difficult to rust or discolour. Pushed to their absolute limits they certainly can still rust, but it takes a lot of mistreatment for that to happen.
Remember to follow the care recommendations for all Japanese Knives: