Eikichi Yazawa (矢沢 永吉, Yazawa Eikichi; born September 14, 1949) is a Japanese singer and songwriter. He is the father of singer-songwriter Yoko Yazawa. He has been nicknamed as "Ei-chan" (永ちゃん), "Boss" and "The King of Rock".
Source: “Eikichi Yazawa”, English Wikipedia (CC BY-SA 4.0), excerpt