Part four of our Revised Introduction to Japanese History is all about the Taika Reforms of 645 CE: what drove them, why do they matter, and why does the more traditional answer to those questions leave some important gaps in our understanding?
Mitsusada, Inoue. “The Century of Reform”, in The Cambridge History of Japan, Vol 1: Ancient Japan
Fuqua, Douglass. “Centralization and State Formation in Sixth- and Seventh-century Japan” and Bruce L. Batten, “Early Japan and the Continent” in Japan Emerging: Premodern History to 1850. ed. Karl Friday