The president of the Constitutional Court of Korea has criticized Japan for denying its military's sex slavery during World War Two. 
 
President Park Han-chul gave a lecture at Harvard Law School in Boston on Wednesday about the duty of the state to protect women from the violation of their rights. 
 
He said Japan has not provided compensation to victims over the past 20 years since the 1993 Kono statement issued by then Chief Cabinet Secretary Yohei Kono. Kono officially acknowledged Japan's forced recruitment of sex slaves, known euphemistically as comfort women.
 
The Constitutional Court chief also said though it is confirmed the sex slavery happened, the government of Japanese Prime Minister Shinzo Abe will not admit it and has argued to revise the Kono statement. 
 
Park's lecture was held to shed light on the court’s 2011 ruling that called for diplomatic efforts by Seoul to address the sex slavery issue.