Keiun no kaikaku is a political reform of Ritsuryo system (a system of centralized government based on Ritsuryo Code) at the imperial court under the reign of Emperor Monmu, which was carried out since 706 at the end of the Asuka period.
慶雲の改革（けいうんのかいかく）は、飛鳥時代末期の慶雲3年（706年）以降、文武天皇統治下の朝廷において行われた律令体制改革をいう。