Nomura Holdings Inc., Japan's largest investment bank, will lose roughly 60 percent of the Japanese equity employees acquired when it purchased the Asia-Pacific business of bankrupt Lehman Brothers Holdings Inc., three sources said.

About 100 of the 170 workers in Lehman's Japan equity research, sales and electronic-trading unit plan to leave the Tokyo-based company, the sources said. The departures include two Lehman managing directors, Kazutoshi Okubo and Koichiro Chiwata, who are joining London-based Barclays PLC.

Global finance firms including Barclays and Mizuho Financial Group Inc. are picking up Lehman employees after the firm failed three weeks ago in the biggest U.S. bankruptcy on record.