In the late 50s, a group of four individuals known as Royal Knights came into existence. The members included Matsukawa Yoshiaki, who was born on October 3rd, 1941 and was a top tenor. Katsuyama Kunio, also known as Kenji Yamashita, was born on January 5th, 1947 and was a second tenor. Sasaki Jou, born on November 16th, 1937, was a bariton, while Yamashita Kenji, born on September 17th, 1937, was a bass.