Tsushimanada Yakichi was a Japanese professional sumo wrestler from Tsushima in the Nagasaki Prefecture. As of May 1962, he is one of six wrestlers in that prefecture to have reached or surpassed the rank of ōzeki, and the first to have achieved this feat since the fourth Tamagaki Gakunosuke, 107 years earlier.

Dewanoumi stable is a stable of sumo wrestlers, part of the Dewanoumi ichimon or group of stables. It has a long, prestigious history. Its current head coach is former maegashira Oginohana. As of January 2023 it had 19 wrestlers.