In the medieval period when Shisho (the Four Books of Confucianism) became valued under the influence of the Sung Study (Neo-Confucian), 'Myogyodo shisho' was newly established in Myogyodo, and in defiance of this, okototen called Gakkoten was set up to maintain the prerogative in learning in the Ashikaga School.
中世に入ると、宋学の影響によって四書が重視されるようになると、明経道において新たに「明経道四書」を制定し、また足利学校でもこれに対抗して学校点と呼ばれる乎古登点を定めて学術における特権維持を図った。