final List<FunctionScoreQueryBuilder.FilterFunctionBuilder> flist = new ArrayList<>();

        if (isSingleWordQuery(query) && !isHiraganaQuery(query)) {
            flist.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(QueryBuilders.prefixQuery(FieldNames.TEXT, query),
                    ScoreFunctionBuilders.weightFactorFunction(prefixMatchWeight)));

        assertTrue(queryBuilder.isHiraganaQuery("あ"));
        assertTrue(queryBuilder.isHiraganaQuery("あおぞら"));
        assertTrue(queryBuilder.isHiraganaQuery("けんさく"));
        assertTrue(queryBuilder.isHiraganaQuery("あいうえおかきくけこさしすせそたちつてとなにぬねのはひふへほまみむめもやゆよをわん"));
        assertTrue(queryBuilder.isHiraganaQuery("がぎぐげござじずぜぞだぢづでどばびぶべぼ"));
        assertTrue(queryBuilder.isHiraganaQuery("ぁぃぅぇぉっゃゅょ"));

        } else {
            index = SuggestConstants.EMPTY_STRING;
        }

        final boolean singleWordQuery = queryBuilder.isSingleWordQuery(query);
        final boolean hiraganaQuery = queryBuilder.isHiraganaQuery(query);
        for (int i = 0; i < hits.length && words.size() < size; i++) {
            final SearchHit hit = hits[i];

            final Map<String, Object> source = hit.getSourceAsMap();