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Nishijima is also credited with coining the expressions Kanji bunka-ken ( 漢字文化圏 , " Chinese-character culture sphere " ) and Chūka bunka-ken ( 中華文化圏 , " Chinese culture sphere " ) , which were later borrowed into Chinese .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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