Why Kim Jong Un never talks about his mother - or her controversial bloodline

Here is the latest breaking news from around the world: Why Kim Jong Un never talks about his mother - or her controversial bloodlineBySangmi HanBBC News Korean, Reporting fromSeoulPublished1 hour agoAmong the many mysteries shrouding North Korean leader Kim Jong Un, the secrecy around his mother stands out. In his 15 years of rule, he has never once publicly mentioned her by name. The legitimacy of Kim's dictatorship rests heavily on his "Mount Paektu" bloodline - a lineage tied to the mythical founder of the Korean people.

And in a country that prides itself on this hereditary purity, the identity of Kim's mother is not just a secret - but a threat to the regime itself. Image source, Cheong Seong-changImage caption, Ko Yong Hui has never been mentioned by state mediaA mythological birthplaceThe story of the Koreas, according to popular belief, begins on Mount Paektu - a mountain located on the China-North Korea border that is said to be the birthplace of Dangun, the mythical founder of what became Korea's first kingdom. Thousands of years later, Kim Il Sung - the founder of North Korea - reportedly used the mountain as a hideout when fighting against the Japanese.

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His son, Kim Jong Il, was said to be born on those same sacred slopes - despite reports indicating he was in fact most likely born in Russia - and for decades since the mountain has been used to legitimise the Kim dynasty. "Kim Jong Un became heir in his 20s despite having no achievements, solely because of the Paektu bloodline," Ryu Hyun-woo, an exiled North Korea diplomat, wrote in his book, Kim Jong Un's Secret Vault. But the reality of Kim's maternal lineage paints a different picture.

Hundreds of miles away from Mount Paektu lies the city of Osaka: Japan's historical capital, and the place where Kim's mother, Ko Yong Hui, was said to be born. From what biographers have pieced together, Ko was born in Osaka in 1952 to parents originally from Jeju Island, which sits off the southern coast of what is now South Korea. As residents of Japan, Ko's family were "Zainichi Koreans": immigrants during Japan's 1910-1945 colonial rule of the peninsula.

But when she was about 10 years old, Ko's family emigrated to North Korea. They were among the estimated 93,000 Koreans who moved to North Korea between 1959 and 1984, lured by a resettlement scheme that promised an idyllic life of free healthcare, education and jobs. Migrants to the North were first viewed with envy as they brought cash, clothes and home appliances from the country's capitalist neighbour to the south.

But they were also labelled "jjaepo", a disparaging term for a group considered to be contaminated by foreign, dangerous ideologies. North Korean society is deeply hierarchical, with some analysts comparing it to a caste system. And in this strict social classification - known as songbun – the jjaepo belong to the "wavering class", somewhere between the core and hostile classes.

The development has drawn wide international attention, with diplomatic circles watching closely.