The emergency economic measures unveiled Friday, which focus on reducing banks' sour loans, leave unanswered the key questions that will determine their success.

The plan calls on Japan's 15 major banks to complete the disposal of existing problem loans -- which the Financial Services Agency estimates at 12.7 trillion yen -- within two years. Disposal of newly arising nonperforming loans is to be completed within three years.

The following are the major points of the emergency economic package: