The book should be called historical fiction rather than historical record, but it exerted an immense influence on the sonno joi movement (the movement under the slogan of "Revere the Emperor Expel the Barbarians") at the end of Edo period.
史書というより歴史物語と言うべきだが、幕末の尊皇攘夷運動に与えた影響は甚大であった。