The Yōrō Period in Japan (717–724 CE) was a short but important era during the Nara Period . It took place under the reign of Empress Genshō and was a time of continued development in Japan’s government, legal system, religion, economy, and culture. The imperial court was working to strengthen a centralized state based on the Ritsuryō system , a framework of laws and government rules influenced partly by the political institutions of Tang China. One of the most important developments associated with the Yōrō Period was the Yōrō Code , a revision of the earlier Taihō Code . Although the Yōrō Code was compiled during this era, it was formally promulgated later, in 757 CE . The period also witnessed the completion of the Nihon Shoki in 720 CE , one of Japan’s earliest official historical chronicles. The Yōrō Period was also marked by the continued growth of Buddhism, the development of the capital at Heijō-kyō (modern Nara) , the expansion of imperial administration, and increasing cult...