Masaya Shimizu, often referred to simply as Shimizu-san, is an exceptionally talented knife sharpener who previously worked at Yamawaki Hamono. Known for his precision and deep understanding of blade geometry, he has quickly built a reputation as one of the most promising young sharpeners in Japan, particularly in the demanding craft of single-bevel knives. Shimizu-san regularly showcases his sharpening and restoration work on the YouTube channel Hatsukeya 刃付け屋, where viewers can see the remarkable level of detail, patience, and technical skill required to transform a rough blade into a perfectly balanced cutting tool. His work reflects the often unseen but essential role of the sharpener, the craftsman responsible for refining the blade’s geometry, setting the bevels, and bringing out the knife’s true cutting performance. Supporting and connecting craftsmen like Shimizu-san is Touroku Sakai, a company led by its third-generation owner with a clear mission: to bring together some of Japan’s finest artisans and share their craftsmanship with the world. With decades of experience and strong relationships across the industry, Touroku Sakai collaborates with skilled makers from various regions of Japan to produce authentic, high-quality Japanese knives that reflect the heritage and artistry of the craft.