This is a set of four Kiya knives that my father, who ran a shop over 10 years ago, received from a customer. They have been stored in this wooden box for a long time and are unused, but some rust is visible. From left to right, they are a "Men-tori bocho" (beveling knife), a "Deba bocho" (deba knife), a "Yanagiba bocho" (yanagiba knife), and an "Usuha bocho" (usuba knife). There is space for one more knife on the far left, but I don't know if it was there from the beginning. Thank you.