Japan may allow exports of defense equipment to international organizations such as those involved in UN peacekeeping operations on condition they do not take sides in conflicts, Kyodo News reported Tuesday.

Under Prime Minister Shinzo Abe, Japan is reviewing various aspects of defense including its self-imposed ban on weapons exports.

But resentment of Japan's wartime aggression runs deep in both China and South Korea and any decision by Japan to become more active militarily is likely to cause tension.

Japan in 1967 drew up "three principles" on arms exports, banning sales to countries with communist governments, those involved in international conflicts or those subject to UN sanctions.

The rules eventually became almost a blanket ban on arms exports and on the development and production of weapons with countries other than US, making it difficult for Japanese defense contractors to drive down costs and keep up with arms technology.

The government is also considering easing rules on the transfer of its defense equipment to third parties, Kyodo said.

Under current rules, countries buying defense equipment from Japan must get Japan's approval before they can transfer it to a third party.

Defense contractors that could benefit from any loosening of the export ban include Mitsubishi Heavy Industries Ltd and Kawasaki Heavy Industries Ltd.

Abe, who took office at the end of 2012, aims to lift constraints placed by Japan's post-war pacifist constitution on its military.

Article 9 of the constitution, drafted by occupying US forces after the country's defeat in World War II, renounces the right to wage war and, if taken literally, rules out the very notion of a standing army.

Reuters