Japan should think twice before moving to support U.S. military retaliation for the Sept. 11 terrorist attacks in the United States, a volunteer aid worker said in Tokyo on Wednesday.

"There is much talk now of what we should do (to aid the U.S.) But there should be more discussion on what we should not do" to avoid further disaster, Tetsu Nakamura, a doctor who has worked in Afghanistan and Pakistan for 17 years, said before a gathering organized by a group of Diet lawmakers.

Nakamura and his group -- the Fukuoka-based nongovernmental organization Peshawar-kai -- have been working on projects to help Afghan refugees since 1986. Their activities range from providing free medical treatment by opening clinics to securing water supplies in regions suffering prolonged drought.