Japanese morphological analysis engine written in pure Python
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Tomoko Uchida
Latest commit 170e976 Sep 17, 2018



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Janome is a Japanese morphological analysis engine written in pure Python.

General documentation:

https://mocobeta.github.io/janome/en/ (English)

https://mocobeta.github.io/janome/ (Japanese)


Python 2.7.x or 3.3+ is required.


[Note] This consumes about 500 MB memory for building.

(venv) $ python setup.py install


(env) $ python
>>> from janome.tokenizer import Tokenizer
>>> t = Tokenizer()
>>> for token in t.tokenize(u'すもももももももものうち'):
...     print(token)
すもも 名詞,一般,*,*,*,*,すもも,スモモ,スモモ
も    助詞,係助詞,*,*,*,*,も,モ,モ
もも  名詞,一般,*,*,*,*,もも,モモ,モモ
も    助詞,係助詞,*,*,*,*,も,モ,モ
もも  名詞,一般,*,*,*,*,もも,モモ,モモ
の    助詞,連体化,*,*,*,*,の,ノ,ノ
うち  名詞,非自立,副詞可能,*,*,*,うち,ウチ,ウチ
(env) $ python
>>> from janome.tokenizer import Tokenizer
>>> from janome.analyzer import Analyzer
>>> from janome.charfilter import *
>>> from janome.tokenfilter import *
>>> text = u'蛇の目はPure Pythonな形態素解析器です。'
>>> char_filters = [UnicodeNormalizeCharFilter(), RegexReplaceCharFilter(u'蛇の目', u'janome')]
>>> tokenizer = Tokenizer()
>>> token_filters = [CompoundNounFilter(), POSStopFilter(['記号','助詞']), LowerCaseFilter()]
>>> a = Analyzer(char_filters, tokenizer, token_filters)
>>> for token in a.analyze(text):
...     print(token)
janome  名詞,固有名詞,組織,*,*,*,*,*,*
pure    名詞,固有名詞,組織,*,*,*,*,*,*
python  名詞,一般,*,*,*,*,*,*,*
な       助動詞,*,*,*,特殊・ダ,体言接続,だ,ナ,ナ
形態素解析器  名詞,複合,*,*,*,*,形態素解析器,ケイタイソカイセキキ,ケイタイソカイセキキ
です     助動詞,*,*,*,特殊・デス,基本形,です,デス,デス


Licensed under Apache License 2.0 and uses the MeCab-IPADIC dictionary/statistical model.

See LICENSE.txt and NOTICE.txt for license details.


Special thanks to @ikawaha, @takuyaa and @nakagami.


Copyright(C) 2015, moco_beta. All rights reserved.