Raizo Mine
From Detective Conan Wiki
Raizo Mine (峰 雷蔵 Mine Raizo ), is the character of Gosho Aoyama's second manga Yaiba. He was voiced by Unsho Ishizuka.
About
Raizo Mine is Sayaka's father and an old rival of Kenjuro. He is a kendo master and owns his own dojo.
Conan vs. Kid vs. Yaiba
Raizo was so glad that the famous detective, Kogoro Mouri came to his house for protecting his treasured sword from the threat of Kaitou Kid.
In the original Magic Kaito chapter, Raizo thanked Shinichi Kudo for giving the treasured sword back to him.