Ōbaku Zen, which was founded by the eminent monk, Ingen Ryuuki (1592-1673), during the Chongzhen period of the late Ming dynasty, was one of the most crucial mediums for intercultural exchange between early modern China and Japan. This article has selected the chanter Dokutan Shoukei (1628-1706), the brilliant disciple of Ingen Ryuuki and fourth patriarch of Ōbaku Zen, as a research subject and bases its analysis on the poems and prose, written notes, quotations and other documents he compiled during his tenure as abbot of Shousan Hourin-ji (a temple located in current Harnamatsu-shi, Shitsuoka-ken, Japan). I aim to survey the Chinese and Japanese stories collected by Dokutan Shoukei as well as his personal experiences regarding religious "efficacy." Additionally, considering his foreign observations concerning interactions with the folklife of Kanasashi, this article sketchs an outline regarding his missionary activities in Japan.