Ramaphosa has urged men to change what he described as their "sexist and patriarchal attitudes" which he says lie at the root of violence against women.
He made the comments on the International Day for the Elimination of Violence Against Women, just hours after another brutal attack, in which a woman was raped and stabbed multiple times.
Launching a campaign against femicide, Mr Ramaphosa described such violence as "a great shame on our nation".
Some 2,700 South African women were murdered by men last year, and 100 rapes reported each day.
The government has set aside more than $100m (£77m) for a plan to deal with the issue.
Congo protesters storm UN camp
Protesters in the Democratic Republic of Congo have stormed a United Nations peacekeepers' camp and burned the town hall in the eastern town of Beni.
The security forces fired at the demonstrators in an attempt to disperse them.
The protesters are angry about what they see as the failure of the authorities to deal with an armed Islamist group which has killed dozens of people in the region, including eight overnight.
The Allied Democratic Forces have stepped up attacks in recent weeks in response to a new army offensive against them.
Egypt christian women win big
A Coptic Christian woman in Egypt has won a legal battle to receive the same share of her father's inheritance as her brothers.
The verdict could set a precedent in Egypt where Islamic law, or Sharia, is used - whatever the individual's religion - in personal status law.
Sharia stipulates that a woman should receive only half the share of her brother's inheritance.
Huda Nasrallah - a human rights lawyer - brought the case, with the backing of her brothers, in order to test the legality of the statute.
The disparity between men and women in inheritance has become a big issue in several Arab countries after Tunisia proposed a law that would ensure equality.
'Rain risk continues' after Kenya disaster
At least 56 people have died in landslides caused by torrential rain in Kenya's West Pokot region on Saturday.
Hundreds of families have been made homeless and are sheltering in churches and schools, and desperately need food, water and other supplies.
Thirty other people are still missing.
Weather experts in East Africa are warning of a continued, heavy downpour that could bring more devastation, particularly in landslide-prone areas.
"Floodplains that are receiving heavy rainfall are [also] at risk", said Samwel Mwangi of Kenya's meteorological department.
"Governments are always prepared, but acts of nature like this can never be 100% prepared for," he told the BBC.
"We are giving early warning information and deploying emergency operations to remove people from areas that are high risk."
Sign up to hear from us about specials, sales, and events.
Make Payment to African World News