Ken Yamamoto, known affectionately as "Leaf," is a Canadian-born animator and director who has made significant strides in the world of Japanese animation since moving to Japan at age 12. His most recent work, *Umamusume: Pretty Derby - Beginning of a New Era* (2024), has quickly garnered attention in the collector community, not just for its vibrant animation but also for its unique blend of sports and fantasy elements that resonate with fans of the original series. Collectors seek out his work not only for its artistic merit but also for its limited physical releases, which often include exclusive bonus content and stunning artwork. Yamamoto's journey began at Production I.G, where he honed his craft and contributed to various projects, gaining a reputation for his innovative storytelling techniques. His ability to create visually captivating narratives has made his films desirable among enthusiasts of physical media, especially those who appreciate the craftsmanship behind each release. As a freelancer, he continues to push the boundaries of animation, making his upcoming titles highly anticipated in the collector's market.