Despite its withdrawal from Japanese retail banking more than a year ago, Citigroup sees good prospects for companies seeking business opportunities abroad and investors interested in global markets, the head of its Japan operations said.

"All of the trends that you see in corporate Japan and institutional Japan really tend to benefit firms like ours that can help the Japanese clients," Citigroup Japan Holdings CEO Anthony Della Pietra said in a recent interview. "Our global network is really the key competitive advantage."

For instance, increasing numbers of Japanese companies have been set to go overseas and Citi can provide support from a planning stage with advice on potential acquisition targets, said Della Pietra.