A Proper Approach to Japanese Morphological Analysis: Dictionary, Model, and Evaluation

In this paper, we discuss lemma identification in Japanese morphological analysis, which is crucial for a proper formulation of morphological analysis that benefits not only NLP researchers but also corpus linguists. Since Japanese words often have variation in orthography and the vocabulary of Japanese consists of words of several different origins, it sometimes happens that more than one writing form corresponds to the same lemma and that a single writing form corresponds to two or more lemmas with different readings and/or meanings. The mapping from a writing form onto a lemma is important in linguistic analysis of corpora. The current study focuses on disambiguation of heteronyms, words with the same writing form but with different word forms. To resolve heteronym ambiguity, we make use of goshu information, the classification of words based on their origin. Founded on the fact that words of some goshu classes are more likely to combine into compound words than words of other clas...

• Type: Conference
• Year: 2008
• Where: LREC
• Authors: Yasuharu Den, Junpei Nakamura, Toshinobu Ogiso, Hideki Ogura
• Keywords: Education, Lemma Identification, LREC 2008, Writing Form, Writing Form Corresponds