Tetsu is a Japanese word that translates to "iron" in English. It is often associated with strength and durability, reflecting the properties of the metal. In various contexts, Tetsu can refer to iron used in construction, manufacturing, or even in traditional Japanese crafts, such as the making of tetsubin, which are cast iron teapots. In popular culture, Tetsu may also refer to characters in anime or manga, such as Tetsu Kuroko from the series Kuroko's Basketball. These characters often embody traits of resilience and determination, mirroring the qualities of iron itself.