Royal Knights was a group of 4 that existed in the late 50's.
The Members were
* Matsukawa Yoshiaki (松川義昭), born 03.10.1941, Top Tenor
* Katsuyama Kunio (勝山邦夫), born 05.01.1947, Second Tenor
* Yamashita Kenji (山下健二), born 17.09.1937, Bariton
* Sasaki Jou (佐々木襄), born 16.11.1937, Bass
