In 1926 through the Yomiuri Shimbun, In (Nihon Ki-in) vs Sha (Kisei-sha) matches (officially called Nihon Kiin Tai Kisei-sha Haitai Teai) were started, which were also called Taisho-daisogo.
1926年に読売新聞を通じ、棋正社と日本棋院の間で院社対抗戦（正式名称は日本棋院対棋正社敗退手合）を開始、大正大争碁とも呼ばれる。