About the shape - This is the knife for smaller jobs that are done in your hand. Think about coring strawberries, cutting fruits in hand, and peeling potatoes. Additionally, Petty knives are an indispensable tool for those who feel uncomfortable wielding a larger chef knife.
About Masakage Koishi - These knives have been named Koishi (pebbles) for the tsuchime (hammered) and kurouchi (black) finish that give the impression of river pebbles. With theoctagonal cherry wood and black pakka handle, the overall balance and feel is what chefs desire and makes it a Culinary Badass. Think Chuck Norris, but if he was a kitchen knife.
Aogami Super is the king of knife steel - super easy to sharpen, gets a laser beam edge, cuts like silk and is very rugged for its hardness. It’s called SUPER for a reason. The outer layer is stainless steel, making this knife very easy to maintain.