He writes that Confucianism had been overwhelmed by Buddhism since the Engi and Tenryaku Period and it changed into the learning of Zen monks, that Seika FUJIWARA began the serious study of Shushigaku, and that later Jinsai ITO and his son Togai ITO, Ansai YAMAZAKI, Toju NAKAE, and Sorai OGYU tried to criticize Shushigaku for meiri (fame and profit), insisting on different theories from Shushigaku such as Yomeigaku (Neo-Confucianism based on teaching of WANG Yangming) and Kobunjigaku (study of ancient rhetoric school), and finally he stresses that Shushigaku is the right and completed Confucianism from which meiri was eliminated.
延喜・天暦以来、儒教が仏教に圧倒されて儒教が禅僧の学問と化したこと、藤原惺窩が日本における宋学の端緒を付けたこと、その後伊藤仁斎・伊藤東涯父子や山崎闇斎・中江藤樹・荻生徂徠らが、名利をもって陽明学や古文辞学などの異説を掲げて朱子学の排撃を試みたこと、だが朱子学こそが名利を捨てて学問として成就された正統な儒学であることを論じている。