At one time, the Kanjuruhan kingdom was under the leadership of Akuwu Singhasari Ametung, who was married to Ken Dedes. At that time the Kingdom was under the rule of the Kingdom of Kediri, and the Singhasari Government Center was in Tumapel. Only after Ken Arok killed Akuwu Ametung and married Ken Dedes did the centre of control move to the Malang Kingdom, and this only after defeating the Kingdom of Kediri. Kediri at that time fell into the hands of Singhasari.