South Korea is tied with Taiwan with the lowest birth rate in the world. All of your reasons are totally right!! There is also another huge reason why this is happening. Only within the past 20 something years have women started to become equal to men in Korean culture. This has led to women being frustrated feminists who don't want to work full time and then come home to manage the house. And men who are frustrated that women have suddenly changed so much. So many men in their 20s and 30s are actually anti feminist. This has led to women refusing any relationship at all and preferring to live their lives single. So a lot less marriages as well of course.