After eight years as an apprentice to a renowned yosegi-zaiku master, Shimizu struck out on his own and opened his own shop, Luthier, in 2011. His work is notable for its blend of traditional and unconventional styles and its application to items that do not usually feature yosegi-zaiku patterns — including castanets, dustpans, and balls. Now he is helping to train a group of apprentices to carry on the tradition.