elasticsearch/docs/reference/elasticsearch-plugins/analysis-kuromoji-baseform.md
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Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com>
Co-authored-by: Liam Thompson <leemthompo@gmail.com>
Co-authored-by: Martijn Laarman <Mpdreamz@gmail.com>
Co-authored-by: István Zoltán Szabó <szabosteve@gmail.com>
2025-02-27 17:56:14 +01:00

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Markdown

---
mapped_pages:
- https://www.elastic.co/guide/en/elasticsearch/plugins/current/analysis-kuromoji-baseform.html
---
# kuromoji_baseform token filter [analysis-kuromoji-baseform]
The `kuromoji_baseform` token filter replaces terms with their BaseFormAttribute. This acts as a lemmatizer for verbs and adjectives. Example:
```console
PUT kuromoji_sample
{
"settings": {
"index": {
"analysis": {
"analyzer": {
"my_analyzer": {
"tokenizer": "kuromoji_tokenizer",
"filter": [
"kuromoji_baseform"
]
}
}
}
}
}
}
GET kuromoji_sample/_analyze
{
"analyzer": "my_analyzer",
"text": "飲み"
}
```
which responds with:
```console-result
{
"tokens" : [ {
"token" : "飲む",
"start_offset" : 0,
"end_offset" : 2,
"type" : "word",
"position" : 0
} ]
}
```