"filter" : ["lowercase", "content_length_filter"]
      }
    },
    "char_filter" : {
      "zero_width_spaces": {
        "type":       "mapping",
        "mappings": [ "\\u200C=> "]
      },
      "mapping_char" : {
        "type" : "mapping",
        "mappings" : ["ｶﾞ=>ガ", "ｷﾞ=>ギ", "ｸﾞ=>グ", "ｹﾞ=>ゲ", "ｺﾞ=>ゴ", "ｻﾞ=>ザ", "ｼﾞ=>ジ", "ｽﾞ=>ズ", "ｾﾞ=>ゼ", "ｿﾞ=>ゾ", "ﾀﾞ=>ダ", "ﾁﾞ=>ヂ", "ﾂﾞ=>ヅ",