A good whetstone and a little practice will keep all of your knives sharp and in perfect condition. The beauty is that it doesn’t take much effort to learn, just a good bit of practice to get the angle right and keep a consistent angle while you’re sharpening. Whetstones are available in department stores or online, and while they range in price based on the fineness of the grit, this thread at eGullet can help you pick a good grit to start with.

The 6000 grit is great for having a nicely polished edge, it's the last step stone that I use for my knives in the kitchen. I like the King stones in general, they're a really good value and last much longer than the discount/cheap water stones. I use these stones to keep all of my kitchen knives nice and sharp and haven't had an issue with these stones. I also like that these soak quickly, I let them soak for about 10-20 minutes and they're ready to use. I have to flatten these a little more often than more expensive stones but I knew that was probably going to be the case when I bought them.
After several uses the Kamikoto is proving itself to be better than expected. As a professional I use different knives all the time and in fact have several thousand dollars worth of very fine blades of various manufacture. As it stands right now, if I could pick only one knife from all of them, I would take the Kamikoto. Fish, vegetables, raw meat, cooked meat, it handles them all very well and is a pleasure to use because of excellent balance and weight. And the edge… magnificent. Care and careful sharpening will be important, but then it always is with the finest of things. I would unhesitatingly recommend this product to people who appreciate the best. This is not a knife for fools or clumsy people. Buy, use, enjoy. And to the people at Kamikoto; “Thank You for making such a beautiful thing!”