Mizuho Financial Group is aiming to become Asia’s top investment bank by bolstering equity underwriting as well as mergers and acquisition (M&A) advisory, seeking to replicate the headways the firm has made in the U.S.

Japan’s third-largest financial group plans to deepen ties between its banking and securities units in Asia and Europe in order to boost revenues, Yutaka Nanjo, head of global investment banking at Mizuho Securities, said in an interview. In the U.S., Mizuho wants to further leapfrog rivals to rank regularly in the top 10 for investment banking, Nanjo said.

"In the U.S., we built our own platform ahead of competitors and are leading Japanese securities firms,” said Nanjo, who sees UBS Group and BNP Paribas as competitors. "We must strengthen Europe and Asia, which are outside our core strength in the Americas.”