"italian_stemmer"
          ]
        },
        "japanese_analyzer": {
          "type": "custom",
          "char_filter": [
            "mapping_ja_filter",
            "fess_japanese_iteration_mark"
          ],
          "tokenizer": "japanese_tokenizer",
          "filter": [
            "truncate10_filter",
            "fess_japanese_baseform",
            "fess_japanese_stemmer",