Private equity firm and Japanese institutional investors drawn to opportunities in the asset class Taisuke Sasanuma, a co-founder of Advantage Partners, is a former Bain & Co. consultant and a pioneer of Japan's private equity industry. (Nikkei montage/Source photos by Yuji Murakami) TOKYO -- Japanese private equity firm Advantage Partners is considering launching an infrastructure fund as a homegrown alternative to Western giants and to tap into growing demand for such funds in Japan.