) ▁was ▁a ▁sum o ▁wrest ler . ▁He ▁was ▁the ▁sport ' s ▁ 3 0 th ▁y ok oz una . ▁ ▁Career ▁He ▁joined ▁Iz ut su ▁stable ▁and ▁made ▁a ▁debut ▁in ▁January ▁ 1 9 1 0 . ▁His ▁first ▁sh ik ona ▁or ▁fighting ▁name ▁was ▁Gen ji y ama . ▁He ▁was ▁promoted ▁to ▁the ▁top ▁mak u uch i ▁division ▁in ▁January ▁ 1 9 1 6 . ▁He ▁was ▁promoted ▁to ▁ ō ze ki ▁in ▁January ▁ 1 9 2 2 . ▁ ▁After ▁ Ō n ish iki ▁U ich ir ō ▁left ▁the ▁sum o ▁world , ▁there ▁remained ▁only ▁one ▁y ok oz una , ▁To ch igi y ama , ▁in ▁Tokyo ▁sum o ▁at ▁that ▁time . ▁The ▁Tokyo ▁Sum o ▁Association ▁wanted ▁to ▁promote ▁one ▁more ▁y ok oz una . ▁Although ▁he ▁didn ' t ▁record ▁significantly ▁superior ▁results , ▁he ▁was ▁awarded ▁a ▁y ok oz una ▁lic ence ▁in ▁April ▁ 1 9 2 3 . ▁He ▁was ▁promoted ▁to ▁that ▁rank ▁without ▁winning ▁any ▁champion ships ▁in ▁the ▁top ▁mak u uch i ▁division . ▁Therefore , ▁his ▁promotion ▁was ▁controvers ial , ▁although ▁champion ships ▁( y ū sh ō ) ▁before ▁January ▁ 1 9 2 6 ▁were ▁officially ▁awarded ▁by ▁not ▁the ▁Sum o ▁Association ▁but ▁a ▁newspaper , ▁the ▁Os aka ▁Main ichi ▁Sh imb un . ▁To ▁mark ▁his ▁promotion ▁he ▁changed ▁his ▁sh ik ona ▁to ▁N