The main problem with Japan's official development assistance lies not in its quantity but in its lack of expertise, a specialist in development economics said Tuesday.

Addressing a news conference in Tokyo, University of Denver Professor Haider A. Khan gave two examples of shortcomings in Japanese aid: the lack of effort by the Japanese to communicate in the language of the recipient countries and the lack of overall knowledge that these people have.

Khan's comments come at a time when Japan is moving to revise its ODA charter to reflect a distribution policy that is more closely linked to its national security.