Mathematical Linguistics
Online ISSN : 2433-0302
Print ISSN : 0453-4611
Paper (B) to the Special Issue
Quantitative Analyses of Koji Uno’s Works before and after the Illness
Xueqin LiuMingzhe Jin
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2017 Volume 31 Issue 2 Pages 128-143


This manuscript aims to clarify the changes of Koji Uno’s writing styles after he suffered mental illness in 1927. In order to understand the differences in Uno’s works before and after his illness, a quantitative analysis using correspondence analysis and statistical hypothesis testing was employed. By analyzing the textual measurements, we found that his writing style after recovering from the illness is different from the previous. Both the frequency of Chinese characters and the vocabulary richness increased in the works written after the illness. These results, after further analysis, mainly consist of an increase in the use of nouns in later writings. Consequently, the overall writing style changed from spoken to written language. Furthermore, the overuse of the comma has an impact on the loss of the garrulity and fluency, which led to the changes in the style of the writings after the illness. Additionally, the work named ‘Nichiyobi’ which had been published before the disease treatment is more similar with the works written after recovering, indicating that the writing style had been changed even before the illness.

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© 2017 The Mathematical Linguistic Society of Japan
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