This research is a report to consider the authenticity of kuntenshiryo(訓点資料) which have been found across Japan. For factual analysis of Japanese language history, kuntenshiryo is indispensable. This is the part 1 of reports which examine "authority" of kuntenshiryo. The 52nd rule "souzanhosshin(曹山法身)" of Shoyoroku(従容録), which is a collection of koan(公案) of Soto-Zen(曹洞禅), is illustrated in this report, which tries to show what originated in "Japanese existentialism."