In 1960, virtually the entire Shingeki community was mobilized to battle against revision of the
U.S.-Japan Security Treaty (known as "Anpo" in Japanese), under the auspices of an umbrella organization called the Shingeki Workers Association (新劇人会議
Shingekijin Kaigi). However, many younger members of the troupes, who tended to sympathize with the student radicals in the
Zengakuren student federation, One of the earliest new troupes to break away was the Seinen Geijutsu Gekijō ("Youth Art Theater"), abbreviated Seigei, founded by 20 members of the third graduating class of Mingei's training program, several of whom had been denied jobs, Immediately following the Anpo Protests, Seigei staged its first production, which included a play written by Fukuda called
Record Number 1, which is often cited as the first Angura-style play.
Record Number 1 was extremely unorthodox and experimental, blurring the lines between reality and play and breaking the
fourth wall. In this play, the actors of Seigei expressed their emotions and frustration around their experiences in the recently concluded Anpo protests. A large number of Angura directors and playwrights worked with Seigei and Fukuda in the early 1960s, including
Jūrō Kara,
Makoto Satō, and
Minoru Betsuyaku. Betsuyaku helped co-found the
Waseda Little Theater with
Tadashi Suzuki. Other influential Angura troupes included
Shūji Terayama's
Tenjō Sajiki,
Kazuyoshi Kushida's
Free Theater,
Yukio Ninagawa's
Contemporary Theater, and
Shogo Ōta's
Transformation Theater. ==Characteristics==