He made the announcement at the UN General Assembly while pressing for reforms that would allow Japan -- the second largest contributor to the UN budget -- to become a permanent member of the Security Council.
The package includes USD 810 million to assist refugees from, and people displaced within Syria and Iraq -- triple the amount Japan provided last year -- and USD 750 million for peace building in the Middle East and Africa.
"Each of these assistance measures is an emergency countermeasure that Japan is able to undertake," Abe told the General Assembly.
"But at the same time, our unchanging principle is at all times to endeavor to return to the root of the problem and improve the situation."
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The Syrian war, now into a fifth year, has killed more than 240,000 people and forced four million people to flee abroad, contributing to the worst refugee crisis since World War II.
"I wish to look squarely at the fact that behind the refugees we find a much larger number of people who are unable even to flee and become refugees," Abe explained.
The Syrian war has helped spark mounting calls for changes to the powerful Security Council, which has been deeply divided over how to address conflict with Russia pitted against Western powers.
Japan joined Brazil, Germany and India on the sidelines of a UN development summit Saturday to push for seats in a revamped Council that they said would do a better job of addressing global crises.
He highlighted Japan's role in training more than 20,000 police personnel in the Democratic Republic of Congo, and army engineers working in Kenya, Rwanda, South Sudan, Tanzania and Uganda.
Japan is in the process of upgrading its domestic laws so that it can play a more active role in UN peacekeeping, he said. Japan's pacifist constitution has barred Tokyo from sending troops in peace operations.