Halting borderless acts of terrorism calls for a unified international effort in Afghanistan, including a continued contribution by Japan, experts said Monday during a symposium at the Afghan Embassy in Tokyo.

Afghan Senior Minister Hedayat Amin Arsala urged Japan not only to continue its refueling mission in the Indian Ocean but to look beyond such efforts.

The Upper House is deliberating a special bill to extend the Maritime Self-Defense Force's mission in the Indian Ocean to refuel multinational warships engaged in the "war on terrorism."