It had been called just Sekishu-ryu school until the early Showa period, but to distinguish itself from other schools of Sekishu-ryu school, it took its name from the title of Nobukata in the seventh head, Soen, and changed its name to Sekishu-ryu chado Soen kei (Japanese tea ceremony Soen-kei group of Sekishu-ryu school).
昭和初期までただ石州流と称していたが、石州系他派と区別するため七世の信方の茶号宗猿より流派名をとり石州流茶道宗猿系（せきしゅうりゅうちゃどうそうえんけい）と称している。