Citing the country's fertility rate of 1.17 last year, which was the lowest among member nations of the Organization for Economic Cooperation and Development, the party said it will do everything it can to create the right conditions for childbirths and child rearing.

Plans include raising the maximum monthly salary of women on maternity leave from the current 1.5 million won ($1,320) to 2 million won by 2020, and a 10 million-won allowance after the birth of a second child.

If elected, Hong plans to create the post of a senior presidential secretary for population policy to oversee efforts to boost the birthrate.

The party also promised to offer various housing and job benefits to young people, raise the basic pension of senior citizens and reduce the burden of their medical expenses, and increase financial and medical support for the disabled.

Most opinion surveys rank Hong a distant third behind two liberals, with an approval rating below 10 percent. (Yonhap)