anchor.diff:  
       関西, 国際, 空港
   
  +NOTE: If a text contains full-width characters, the `kuromoji_tokenizer`
  +tokenizer can produce unexpected tokens. To avoid this, add the
  +<<analysis-icu-normalization-charfilter,`icu_normalizer` character filter>> to
  +your analyzer. See <<kuromoji-analyzer-normalize-full-width-characters>>.
  +
   
   [[analysis-kuromoji-baseform]]
   ==== `kuromoji_baseform` token filter
  
positive.code: === Japanese (kuromoji) Analysis Plugin
  
  The Japanese (kuromoji) Analysis plugin integrates Lucene kuromoji analysis
  module into elasticsearch.
  
  :plugin_name: analysis-kuromoji
  include::install_remove.asciidoc[]
  
negative.code: 
  It supports the `mode` and `user_dictionary` settings from
  <<analysis-kuromoji-tokenizer,`kuromoji_tokenizer`>>.
  
  [discrete]
  [[kuromoji-analyzer-normalize-full-width-characters]]
  ==== Normalize full-width characters
  
  The `kuromoji_tokenizer` tokenizer uses characters from the MeCab-IPADIC
  dictionary to split text into tokens. The dictionary includes some full-width
  characters, such as `ｏ` and `ｆ`. If a text contains full-width characters,
  the tokenizer can produce unexpected tokens.
  
  For example, the `kuromoji_tokenizer` tokenizer converts the text
  `Ｃｕｌｔｕｒｅ　ｏｆ　Ｊａｐａｎ` to the tokens `[ culture, o, f, japan ]` by
  default. However, a user may expect the tokenizer to instead produce 
  `[ culture, of, japan ]`.
  
  To avoid this, add the <<analysis-icu-normalization-charfilter,`icu_normalizer`
  character filter>> to a custom analyzer based on the `kuromoji` analyzer. The
  `icu_normalizer` character filter converts full-width characters to their normal
  equivalents.
  
  First, duplicate the `kuromoji` analyzer to create the basis for a custom
  analyzer. Then add the `icu_normalizer` character filter to the custom analyzer.
  For example:
  
  [source,console]
  ----
  PUT index-00001
  {
    "settings": {
      "index": {
        "analysis": {
          "analyzer": {
            "kuromoji_normalize": {                 <1>
              "char_filter": [
                "icu_normalizer"                    <2>
              ],
              "tokenizer": "kuromoji_tokenizer",
              "filter": [
                "kuromoji_baseform",
                "kuromoji_part_of_speech",
                "cjk_width",
                "ja_stop",
                "kuromoji_stemmer",
                "lowercase"
              ]
            }
          }
        }
      }
    }
  }
  ----
  <1> Creates a new custom analyzer, `kuromoji_normalize`, based on the `kuromoji`
  analyzer.
  <2> Adds the `icu_normalizer` character filter to the analyzer.
  
  
  [[analysis-kuromoji-charfilter]]
  ==== `kuromoji_iteration_mark` character filter
  