Lee Eun-sang (1903 - 1982) was a Korean poet and historian. He dedicated to the revival and modernization of sijo, a form of Korean poetry. Because of succeeding typical lyricism that is discovered in Bomcheonyeo (봄처녀) and 'Gagopa' (가고파) etc, because of reappearing of sijo by a modern sense that is accomplished in Donghaesong (동해송) and 'High ground is over there', he is said the best poet in a revival of modern sijo.
In 1918, He graduated from the Changshin High School (창신고등학교) which his father had built, and in 1923, he entered the department of liberal arts at Yunhee College, the predecessor of Yonsei University. He withdrew on 1923. In 1921, for the first time, 'Hyuljo' was published in 'Ahsung' vol.4. as 'Duwuseong'-his other pen name, but his genuine creation started in 1924 when 'Chosun Mundan' was founded. He worked for Changshin School as a teacher until he studied at Waseda University in Japan, majoring in history in 1926. He worked at Ewha Woman's University as a professor from 1931 to 1932. After that, he worked for Dong-a Ilbo and Chosun Ilbo.
In 1942, He was arrested on the suspicion of implicating in the so-called "incident of Chosun Language Academy"(조선어학회사건) and was released from prison the next year because of having his indictment suspended. In 1945, he was detained in custody as a political offender at the Gwangyang police station and was released at the time of independence from Japan.
After Korea`s liberation in 1945, he worked in various kinds of fields such as academic, the press, and history. His works changed focus from the poetic feeling of an individual to an emphases of society: admiration for country, dearest wish for reunification, the memory of patriots. In 1969, he was awarded the President Prize, and in 1970, the Medal of the People -the Mugunghwajang.
After Korea`s liberation in 1945, his works changed focus from the poetic feeling of an individual to an emphases of society: admiration for country, dearest wish for reunification, the memory of patriots. The lastly Yangjang Sijo, a new type of Sijo, being published in this volume appears in which the second line among the three lines is eliminated to strengthen the poem's implication. Like this, He assimilated typical three line poetry into a modern rhythm, his Sijo came true the freedom of rhythm in basic form.