Astmax Co., Ltd. (JASDAQ:7162) forms a business and capital alliance with Yahoo Japan Corporation (TSE:4689) and plans to sell 23,757 shares, 33.4% stake, in Astmax Asset Management, Inc. to Yahoo Japan, for about ¥1.7 billion, on October 3, 2016. Astmax also said, the company would also sell another 50.1% stake to Yahoo Japan as the second step.