この流派は江戸時代に生まれた茶道の支流だ。
This school is an offshoot of the tea ceremony that arose in the Edo period.
彼の家は名門の支流にあたる。
His family is a branch line of a distinguished house.
その学説は主流から外れた支流と見なされてきた。
That theory has been regarded as an offshoot outside the mainstream.