"One day, when I visited Karate Club of Takushoku University to see a karate practice, I noticed that everyone was punching with his thumb over the pointing finger and middle finger. I thought they were all doing so to prevent the thumb from getting jammed on impact. I came to a conclusion that if I practiced Makiwara karate strikes, I would be able to grab with 5 fingers in judo. As soon as I got home, I started Makiwara strikes. After I practiced it everyday for 3 months, I found my hands grabbing my opponent's dogi firmly with 5 fingers. I discovered many things only after I struck Makiwara. I had thought that those who are trained in judo have strong finger tips, elbow, wrists, and fists. But, when I actually struck the Makiwara, my finger tips, elbow, wrists, and fists all hurt numbingly. Such weak finger tips, elbow, wrists, and fists are useless in pulling the opponent or controlling the opponent using elbows or wrists. I therefore slammed these weak parts onto Makiwara and strengthened them in preparation for bouts. I struck Makiwara with knife hand, backhand, and thrust 4 fingers into a sand box. I did this 1000 times a day."