Kasugano-oyakata (former <i>yokozuna</i> <a href="https://en.wikipedia.org/wiki/Tochinishiki_Kiyotaka" class="extiw" title="en:Tochinishiki Kiyotaka">Tochinishiki</a>) teaches his disciple, <i>yokozuna</i> <a href="https://en.wikipedia.org/wiki/Tochinoumi_Teruyoshi" class="extiw" title="en:Tochinoumi Teruyoshi">Tochinoumi</a>, his <i>yokozuna</i> ring-entering style (<i>Unryū</i>) in February 1964
Mainichi Shimbun
1964-02
Mainichi Shimbun (<a rel="nofollow" class="external free" href="https://mainichi.jp/articles/20210129/k00/00m/050/404000c">https://mainichi.jp/articles/20210129/k00/00m/050/404000c</a>)