The fight of the U.S.-Japan Security Treaty and the period of high economic growth are involved in Japanese modem poetry of the 1960’s. An unprecedented and explosive burst of energy presented in the fundamental poetries of the same period such as 『Bousou』(1960.8-1964.1), 『Batten』(1961.6-1964.2), 『Doramukan』(1962.7-1969.9), 『Kyouku』(1964.4-1970.3) shows that they are deviating from lyrical attributes based on sensibility that the poetry of the 1950’s has stressed. 『Kyouku』, the compound of 『Bousou』 and 『Batten』 is seeking essentials and principle of the poetry on the basis of a bold linguistic experiment with contemplating the failure of the fight of the U.S.-Japan Securty Treaty directly. The emphasis of obscene eros made by Suzuki Siroyasu is also on the extension. Furthermore, Yosimasu Kouzo of 『Doramukan』 who sought an unlimited increase of dynamic words and Aamzawa Taijiro who was skilled in making surrealistic images with speed built up the elaborate linguistic world that crosses the boundary of usualness and unusualness. Reader-led poems of Irisawa Yasuo also take a position of language-centered tendency, common in 1960s among poets, which means that it is not the poet who creates poems dominantly but the language that creates poems spontaneously.