As Soho TAKUAN of the Rinzai Sect gave "Fudo chishin myoroku" to Munenori Yagyu and the term of Ken Zen Icchi (The Sword and Zen are One) was used by Edo-Yagyu, Edo-Yagyu was dubbed "Edo-Yagyu of shinpo" while Owari-Yagyu was dubbed "Owari-Yagyu of toho" (sword training).
ここで、臨済宗の沢庵宗彭が柳生宗矩に「不動知神妙録」を与えたことにより江戸柳生で剣禅一致が説かれた結果として「刀法の尾張柳生」に対して「心法の江戸柳生」と言われた。