In this essay the author studies the method of making a stage version of Soga-mono in Tosa Joruri from the viewpoint of its relation to the precedent works. The revenge of the Soga brothers was made so popular by "Soga Monogatari", Noh play, Kowaka-mai, ko-joruri, etc., that it was, as it were, a national tradition. As for Soga-mono Tosa Joruri, the dramatist\u27s effort went into adaptation of it on the basis of these precedent works, while changing it so far as to suit to the public taste of the Edo Period. The method for this purpose was not to change Soga-mono, the favorite of the general public thoroughly, but to add some quite new, different elements to the original. \u27Wada Sakamori\u27 and \u27Yotsugi Soga\u27 are the examples. \u2...