It was unexpectedly late that this series of Reforms became the object of estimation by historians and it is said to be DATE Chihiro (natural father of MUTSU Munemitsu), a senior vassal of the Kishu Domain at the end of the Edo Period, who first discovered the historical value of the Reforms by writing "Taisei-Santen-ko" (Three Stages in the Historical of Japan).
この一連の改革が歴史家によって評価の対象にされたのは意外と遅く、幕末の紀州藩重臣であった伊達千広（陸奥宗光の実父）が『大勢三転考』を著して、初めて歴史的価値を見出したと言われている。