public static function inspect($str)
    {
        $result = array(
            'length' => 0,
            'kanji' => 0,
            'hiragana' => 0,
            'katakana' => 0,
        );

        $result['length'] = self::length($str);
        $result['kanji'] = self::countKanji($str);
        $result['hiragana'] = self::countHiragana($str);
        $result['katakana'] = self::countKatakana($str);

        return $result;
    }