I would assume it's the same of what happens in Italy but at a lower ratio for women in that country.
Men are still culturally attached to the idea that they have to control the life of the women in their family (wife, daughter etc), and at the same time these women want to embrace modernity and the more extreme version of feminism that country like SK are experiencing. This causes resentment so these men end up killing them, because asian still have a deep feeling of shame regarding their family.
I think the gender imbalance is worse on countries like Japan in SK because there the culture is way more controlling over women, so men are gonna react worse to the effect of feminism and women emancipation.