Additionally, while Fujiwara hokke (Northern household of the Fujiwara clan) was in the process of expanding and establishing their clout in the imperial court, power struggles among court nobles became considerably intensified and Onmyodo was used to concoct slander or false accusations aimed at bringing down the rival power from time to time.
さらに、藤原北家が朝廷における権力を拡大・確立してゆく過程では、公家らによる政争が相当に激化し、相手勢力への失脚を狙った讒言や誹謗中傷に陰陽道が利用される機会も散見されるようになった。