Kao Corp., Tokyo, Japan, will buy CT-based John Frieda Professional Hair Care Inc. via its Andrew Jergens Co. unit for $450 million. The purchase of John Frieda Professional Hair Care is part of Kao’s global strategy to focus on the U.S. market.The move, Kao’s biggest step ever in the U.S., marks further progress by Japan’s largest manufacturer of home-use products into global markets. In 2001, Kao lost the bid for Bristol-Myers Squibb’s Clairol hair care business to Proc...