彼は独自の書風で一流を開いた。
He founded a school of his own with his distinctive calligraphic style.
その人物は華道の一流を興したことで知られる。
That person is known for founding a school of flower arrangement.
剣術を極めた末に、彼はついに一流を立てた。
After mastering swordsmanship, he finally established a school of his own.