Coincidentally, with the demise of the Ritsuryo system (the political system based on the ritsuryo codes), the high-level aristocrats lost their eagerness for politics completely, and accordingly, local politics were entrusted to the Kokushi.
時を同じくして、律令制の崩壊と共に、上級貴族は政治への意欲を全くなくし、地方政治は国司に一任されていた。