text: A tradition claims that this ruler beat his rival in an archery contest and embarrassed him by whipping his horses into festival tents.
full_question: A tradition claims that this ruler beat his rival in an archery contest and embarrassed him by whipping his horses into festival tents. This ruler exiled that rival of his to Kyushu after claiming he used black magic to attack the ex-emperor Kazan. In order to celebrate his daughter's accession to empress, he wrote a poem which declares "like the full moon I shine uncovered by any cloud." This man's building of the Hojoji temple is described in the account of his reign, the Eigo Monogatari, or "Tale of Flowering Fortunes." His rule is also the focus of the historical tale Okagami, or the Great Mirror. This man, who rose to the throne over his nephew Korechika, had his daughter, the Empress Shoshi, sent to live at Ichijo's harem. That daughter of this emperor was tutored by Murasaki Shikibu. For 10 points, name this man who ruled at the apex of the Heian era, the greatest ruler of the Fujiwara clan.
first_sentence: A tradition claims that this ruler beat his rival in an archery contest and embarrassed him by whipping his horses into festival tents.
raw_answer: Michinaga no Fujiwara