It is a general term for Beicho KATSURA (the third), Harudanji KATSURA (the third), Shokaku SHOFUKUTEI (the sixth) and Bunshi KATSURA (the fifth), who made efforts in restoring Kamigata rakugo at the time when it almost disappeared.
当時、消えかかっていた上方落語の復興に尽力した、桂米朝(3代目)・桂春団治(3代目)・笑福亭松鶴(6代目)・桂文枝(5代目)の総称。