The Asian Solidarity Conference has been held 12 times since 1992 to press the Japanese government to admit responsibility for allegedly coercing thousands of women into providing sex to Japanese imperial army soldiers across the region.
The six former comfort women attending the meeting -- from South Korea, the Philippines and Indonesia and the daughter of another from China -- also called on the Japanese government to provide compensation to the former sexual slaves.
"We will discuss how the government should apologise and what measures it should take to put the apology into action," the local organisers of the meeting said in a keynote address.
On Wednesday the Japanese government, led by Prime Minister Shinzo Abe, said it would set up an expert team to review how the 1993 statement was drawn up and the historical facts it was based on.
The move came after US President Barack Obama, on a tour of Asia last month, blasted the forced recruitment into prostitution before and during World War II as a "terrible, egregious violation of human rights".
It is unclear what will happen if Tokyo's review is at odds with the 1993 statement, which was largely based on testimony from 16 Korean former comfort women, many of whom have since died.