Tadao Yoshida (198 ~ 1993) was a Japanese entrepreneur. Born in 198 in Heibu Township, Toyama Prefecture, Japan. In 193s, I went to China and Shanghai to study and do business alone. Before the Second World War, I returned to my hometown in Heibu, Japan, and worked as a clerk in a porcelain shop. Tadao Yoshida received a batch of zippers from the bankrupt company, started the zipper repair industry, and founded the first three-S company specializing in zipper production. In 1945, after Japan's defeat, Tadao Yoshida founded a zipper factory in Heibu to make zippers with human machinery. In order to improve the quality of zippers, he introduced the old machines for manufacturing zippers from the United States and produced high-quality zippers with various alloy materials. In 1948, Sans Company changed its name to Yoshida Industrial Co., Ltd., referred to as YKK.