Tokyo, July 12 (BridgeNews) - Japan is struggling with serious fiscal imbalances that are highlighted by its Aa1 foreign currency debt and bank deposit ceilings and Aa2 rating on domestic yen-denominated securities, Moody's Investors Service said in its annual report on the country. The complexity of Japan's malaise means that no single policy, or mix of policies, has been able to place the economy on a sustainable growth path, the report said.