Can a Java Library be used to extract Japanese words from a sentence?

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Yes, there are several Java libraries that can be used to extract Japanese words from a sentence. Some popular options include:

1. Apache OpenNLP: This library includes a Japanese tokenizer that can split Japanese text into words.

2. Kuromoji: This library is a Japanese morphological analyzer that can extract words from Japanese text.

3. MeCab：This library is a Japanese morphological analyzer that can handle various formats of input text.

4. Juman++：This library is a Japanese morphological analyzer that can handle large-scale Japanese text.

These libraries can be used to extract words from Japanese text and then perform further analysis and processing.