跟隨上田桑鳩學習書法，井上有一渴望將書法轉化成藝術，並於1952年打破傳統以藝術書法為目標創立了「墨人會」。於1952年在瑞士巴塞爾藝術館的展覽中得到國際認可。繼年，英國藝術評論家赫伯特．里德(Herbert Read)極其欣賞井上於聖保羅雙年展所展出的作品。同時他的作品在德國第2届文獻展和美國卡內基國際展得到高度的讚譽，並於1962年和1965年於德國科隆的魯道夫·兹威納畫廊開辦個展。通過錯誤法去研發出這獨特的墨水紋理，「單一字」擁有着無與倫比的魅力，具有全面性的價值。尤其是井上著名作品——《貧》，則代表了藝術家的創作精神；井上拒絕將自己的藝術商業化，因此他一生也只是一位教育家。金澤21世紀美術館於2015年為他舉辦了一場大型的回顧展以紀念井上有一的一百週年誕祭。
After studying calligraphy with Ueda Kudo, Inoue aspired to transform calligraphy into art. In 1952, he broke with tradition and founded the "Ink Painting Association" with the goal of artistic calligraphy. Gained international recognition in 1952 during an exhibition at the Kunsthalle Basel, Switzerland. The following year, the British art critic Herbert. Herbert Read greatly admired Inoue's works exhibited at the São Paulo Biennale. At the same time, his works were highly praised at Documenta 2 in Germany and the Carnegie International Exhibition in the United States. In 1962 and 1965, he held solo exhibitions at the Rudolf Zwirner Gallery in Cologne, Germany. Developed through a process of error to develop this unique ink texture, "Single Character" has unparalleled charm and comprehensive value. Especially Inoue's famous work - "Poverty", represents the artist's creative spirit; Inoue refused to commercialize his art. Therefore, he was just an educator throughout his life. The 21st Century Museum of Art in Kanazawa held a large-scale retrospective exhibition for him in 2015 to commemorate the 100th anniversary of Yuichi Inoue's birth.
作品典藏:
國立現代藝術博物館（東京、京都、大阪）、今日美術館（中國北京）、大都會藝術博物館（美國紐約）、東亞藝術博物館（德國科隆）、蘭根基金會美術館（德國諾伊斯）、萊特博格博物館（瑞士蘇黎世）等。
1916 出生於東京
1935 東京府立青山師範學校（現東京學藝大學）畢業
1952 成立「墨人會」
1976 自寒川町立旭小學校校長職務退休
1985 6月15日逝世
