A planned Chinese-led investment bank may not have been the major theme at a meeting of Group of 20 finance chiefs, but it drew significant attention amid the growing presence of emerging economies.

On the sidelines of the gathering, which ended Friday, Finance Minister Taro Aso and his U.S. and German counterparts agreed on the importance of encouraging the Asian Infrastructure Investment Bank to adopt the high standards of existing institutions, including the Asian Development Bank.

"We agreed on the importance of the AIIB securing fair governance and debt sustainability as well as being considerate of the environment and society to meet internationally established standards," Aso told a news conference.