Women have made significant achievements in all levels of society but "it is equally clear that we are not there yet," Liberian President and Nobel Peace Prize winner Ellen Johnson Sirleaf said in Tokyo Friday.

Speaking on the first day of the second World Assembly for Women, Sirleaf, who was awarded the prize in 2011 for her work on women's rights and peace-building, stressed the need to continue tackling all issues hindering women's participation in society.

Advising that men should observe the movement as an opportunity and investment for the benefit of societal and national prosperity, Sirleaf applauded the men who have worked to help ensure women's equal rights, opportunities and participation in all fields.