---
title: kuromoji_readingform token filter
description: The kuromoji_readingform token filter replaces the token with its reading form in either katakana or romaji. It accepts the following setting: When using...
url: https://www.elastic.co/docs/reference/elasticsearch/plugins/analysis-kuromoji-readingform
products:
  - Elasticsearch
---

# kuromoji_readingform token filter
The `kuromoji_readingform` token filter replaces the token with its reading form in either katakana or romaji. It accepts the following setting:
<definitions>
  <definition term="use_romaji">
    Whether romaji reading form should be output instead of katakana. Defaults to `false`.
  </definition>
</definitions>

When using the pre-defined `kuromoji_readingform` filter, `use_romaji` is set to `true`. The default when defining a custom `kuromoji_readingform`, however, is `false`. The only reason to use the custom form is if you need the katakana reading form:
```json

{
  "settings": {
    "index": {
      "analysis": {
        "analyzer": {
          "romaji_analyzer": {
            "tokenizer": "kuromoji_tokenizer",
            "filter": [ "romaji_readingform" ]
          },
          "katakana_analyzer": {
            "tokenizer": "kuromoji_tokenizer",
            "filter": [ "katakana_readingform" ]
          }
        },
        "filter": {
          "romaji_readingform": {
            "type": "kuromoji_readingform",
            "use_romaji": true
          },
          "katakana_readingform": {
            "type": "kuromoji_readingform",
            "use_romaji": false
          }
        }
      }
    }
  }
}


{
  "analyzer": "katakana_analyzer",
  "text": "寿司" <1>
}


{
  "analyzer": "romaji_analyzer",
  "text": "寿司" <2>
}
```