Six Filipino "comfort women" who were forced to work in Japanese military brothels during World War II led a protest Tuesday in front of the Japanese Embassy in Manila to oppose enhanced defense cooperation with Japan.

"The agreement of the Philippines-Japan military alliance has been made concrete. So our fear that our children, our grandchildren will fall victims again to another war and a repeat of the comfort women system is also now concrete," Rechilda Extremadura, executive director of Lila Pilipina (League of Filipino Grandmothers), said at the rally attended by more than 20 supporters.

"That's why we say never again to another generation of comfort women and never again to another generation of war victims," she said.