在戰後，藝術規範和嚴謹的傳統藝術受到藝術家的挑戰。 「不定型藝術（Informel）」 是 1940至 1950年代在法國開始的藝術運動。它追求自發性和自由性，並探索超現實主義的藝術表達。當時位居法國的今井俊滿和堂本尚郎是該藝術運動的日本成員。今井的作品使用鮮明的色彩和爆發性的筆觸同時結合自然與藝術的日本美學意識。堂本以厚塗的油畫表現漩渦般地躍動，衍生出新型態的作畫。這兩位藝術家於 1953年將 「不定型藝術 」的意念帶到日本，捲起「不定型藝術炫風」，對日本具體派的興起有巨大的影響。

Founded in 1954, with the aim to go beyond abstraction and pursue enthusiastically the possibilities of pure creativity, Gutai Art Association emphasized that Gutai art does not alter matter but rather speaks of the delicate interaction between spirit and matter that ultimately enables art to tell a story. The name “Gutai” was meant to “present concrete proof that our spirit is free.” In the exhibition, artworks of the two female Gutai members, Atsuko Tanaka and Yuko Nasaka would be presented. Their admission to the association reflected its gender awareness which confronted the gender subjectivity and low status of female artists at that time. Tanaka took inspiration from electrical diagram, where uncounted circles are intertwined with lines. She uses consistently synthetic resin enamel as mediums. With its glossy matiéres and vivid colors, her creation shows outstanding presence. Nasaka continuously experimented with materials, texture and color through her constant circle paintings. Conveying infinity, circle becomes her lifelong motif for creation.