In this article, I have tried to prove the possibility that the Kenmitsu mondōshō 顕密問答鈔by Raiyu 頼瑜 (1226–1304) was written to object to the Shinzen yūshingi 真禅融心義, written by another person around Kongō zanmai-in 金剛三昧院 in 1263. It is not clear which is the earlier, but one of the two is clearly reacting to the other. And in this way, by arguing with Esoteric Buddhism, Zen probably may be extended.
