Seiki no Kai's manifesto was published after the group's reorganization, in the periodical Sōgō Bunka in November 1948. The manifesto declared: "Seiki no Kai is 20-something culture by 20-somethings, for 20-somethings. Seiki no Kai wants to engage in broad collaborative research, so other than the limiting the age, there are no other kinds of requirements for membership." The goals were to focus on discussing and researching new culture in a collaborative environment, which was reflected in its activities.
