This name is said to have come from the rivalry with the 'Shin-Sekishu-ryu School,' which had been founded by the eighth lord of Koizumi Domain, Sadanobu KATAGIRI, by adding elements of the Edo Senke School to the Sekishu-ryu School.
これは片桐本家の8代小泉藩主片桐貞信が江戸千家の茶風を取り入れて「新石州流」を名乗ったことに対抗したものと伝えられる。