Yes, a Santoku knife can be used for rock chopping. The Santoku knife is a versatile knife that is well-suited for a variety of cutting tasks, including rock chopping. Its shorter blade length and lighter weight make it a good choice for this technique. To rock chop with a Santoku knife, hold the knife firmly with a pinch grip and use a rocking motion to chop the food into small pieces. Be sure to keep your fingers curled under and out of the way of the blade to avoid any accidents.