Hon'inbō Dōetsu (本因坊道悦, 1636–1727) was a Japanese professional go player, who became the third head of the Honinbo house.
Dōetsu challenged Yasui Sanchi to a long match.
Under the beating-down rules (see jubango) he forced Yasui down from sen (Black in each game, for a theoretical difference of two levels) to sen-ai-sen (Black-White-Black).
He did however still meet an official requirement to play oshirogo; he was given a personal allowance of 20 koku of rice.
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