宇野浩二は精神病や挫折による執筆の空白期間を経るたびに異なる文体を編み出すと言われる作家である。本研究は、作品からデータを抽出し、計量的分析手法を用いて、宇野浩二の文体変化に関する諸問題を解明することを目的とする。文芸評論を踏まえ、病気後の文体変化、文体変化の時期、戦後の文体変化、同時代作家との比較の四つの問題を取り上げ、客観的なデータの分析結果に基づき、宇野浩二の文体特徴、文体変化の時期および戦後作品の独特性を明らかにした。 / Kouji Uno is a well-known Japanese littérateur, whose creative activity was interrupted twice because of a mental illness and frustrations. It was reported that his writing style had changed when he resumed writing. The study aims to investigated the differences of Kouji Uno's writing style in his different stages by using quantitative analysis. We demonstrated Uno's stylistic changes after the mental illness, the exact time of these changes, and the characteristics of works published after the War based on the literary criticism and statistical results. In addition, we clarified the uniqueness of his postwar works through a comparative analysis with contemporary writers. / 博士(文化情報学) / Doctor of Culture and Information Science / 同志社大学 / Doshisha University