Kogenshitsu Dokutan Sosan
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Kogenshitsu Dokutan Sōsan (1840-1917) was a Japanese Rinzai Zen priest, who served as abbot of Nanzenji.[1] In the west, he is known for being the Rinzai-teacher with whom Harada Daiun Sogaku, the koan-teacher of Hakuun Yasutani, studied koans.