private function setWordReg()
{
if (null === self::$word_reg) {
$regs = array('々〇〻\\x{3220}-\\x{3244}\\x{3280}-\\x{32B0}\\x{3400}-\\x{9FFF}\\x{F900}-\\x{FAFF}\\x{20000}-\\x{2FFFF}', 'ぁ-ん～ー', 'ァ-ヴ～ー', 'ｦ-ﾟ', '\\!-\\~');
$reg = '[' . implode(']+|[', $regs) . ']+';
$reg .= '|[^' . implode('', $regs) . ']+';
self::$word_reg = $reg;
}
}