The fujiwara rose to power by?

The Fujiwara clan rose to power in Japan during the Heian period by marrying their daughters into the imperial family and using their influence in court politics to gain positions of power and control over key government offices. They also established a system of hereditary succession within their own clan, ensuring that their family members held important positions within the government for generations. Through these strategies, the Fujiwara clan was able to solidify their authority and become one of the most powerful and influential noble families in Japanese history.