養蚕 (yōsan) is the practice of sericulture, which involves the cultivation of silkworms to produce silk. This process begins with the careful selection of silkworm eggs, which hatch into larvae that feed primarily on the leaves of the 桑の木 (mulberry tree). As the larvae grow, they spin cocoons made of silk fibers, which are later harvested for silk production. The cultivation of silkworms has a long history, particularly in countries like 中国 (China) and 日本 (Japan). The silk produced through 養蚕 is highly valued for its softness and luster, making it a popular material in textiles and fashion. This traditional practice continues to be important in various cultures around the world.