TOKYO – A chef who served the very top of the Pyongyang elite thinks Kim Jong Un may soon face challengers intent on usurping his power.

Speculation among North Korea watchers has been even more rampant than usual since the very public ouster of Jang Song Thaek in December, with experts trying to figure out what’s going on inside the world’s most reclusive regime and what may come next.

Jang, the uncle of North Korean leader Kim Jong Un who had served as the nation’s No. 2 official, was suddenly executed for treason last month. Kim Kyong Hui, his wife