What group of people did Japanese emperor Kammu believe had too much influence over court, thus leading him to move his capital elsewhere

Answer 1

The traditional answer is that Kammu was seeking to avoid the entrenched power of the Buddhist temples in the area--it was beginning to overshadow the imperial court. The imperial court was also relatively weak, one player among many elite houses, and often not the most powerful--even if the imperial house was always the most influential.