JX Advanced Metals Corp. cut Japan's biggest initial public offering since Softbank Group Corp.'s to ¥439 billion yen ($2.9 billion), fueling concerns that demand for IPOs is waning after a banner year. The shares will be offered at ¥810 to ¥820 each after feedback from investors, JX Metals said in a filing in Tokyo on Monday. That's as much as 6% lower than what the company had indicated just over two weeks ago.