40 Nations so far join to become members of the AIIB,Japan remains cautious.

Japan remains cautious about signing up to the China-led Asian Infrastructure Investment Bank, indicating that Tokyo will miss the March 31 deadline for application, but both Taiwan and Norway said they would seek to join the institution. Despite warnings from Washington, over 40 nations have joined or said they intend to become members of the AIIB, adding clout to an institution seen as enhancing Beijing's regional and global influence.