Lehman Brothers said on Monday it hired former Nikko Citigroup executive Koichiro Chiwata as head of Japan equity research, and Hidenao Miyajima as chief strategist in Tokyo.

Chiwata joins Lehman from Singapore-based hedge fund Halberdier Capital Research Pte. Before that, Chiwata was head of equity research at Nikko Citigroup, where he worked for 16 years, according to a press release.

Miyajima, who was ranked No. 4 strategist in the Nikkei analyst ranking this year, had been chief executive officer of an independent equity investment advisory firm Parnassus Investment Strategies, Co., Ltd, which he set up in 2003.