assertTrue(request.isHiraganaQuery("あ"));
        assertTrue(request.isHiraganaQuery("あおぞら"));
        assertTrue(request.isHiraganaQuery("けんさく"));
        assertTrue(request.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(request.isHiraganaQuery("がぎぐげござじずぜぞだぢづでどばびぶべぼ"));
        assertTrue(request.isHiraganaQuery("ぁぃぅぇぉっゃゅょ"));

        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)));