Yoshindo Yoshihara is a third-generation swordsmith. His grandfather Kuniie began making swords in 1933 in Tokyo and was ranked among the top swordsmiths in Japan during his career. Yoshindo lives and works in Tokyo with his son, who represents the fourth generation of swordsmiths in the family. Yoshindo, who is always training young swordsmiths and currently has five apprentices working with him, has been named an Important Cultural Property of the city and prefecture of Tokyo, and is a mukansa (top-ranked swordsmith) in Japan.

Leon Kpaa, a molecular biologist, lives with his wife Hiroko in San Rafael, California. He has been seriously interested in Japanese swords for over twenty-five years, and has spent a great deal of time learning about them from Yoshindo.

Hiroko Kapp is a writer for Senken Shimbun News of Tokyo and writes about fashion and the fashion industry in the US. She graduated from Musashi-no Art University in Tokyo. For twenty-five years, she was active in the apparel business and designed scarves for her own line in the US.