He was eventually defeated by Raden Wijaya, Kertanegara's son-in-law using the troops of the Mongol Yuan dynasty that were invading Java.
Kediri is located in a fertile rice-producing area on Brantas River banks, approximately 80 km west of Singhasari, but separated from it by the Arjuno-Welirang volcanoes and Mount Kawi.
Anticipating Mongolian revenge, he prepared to thwart the forthcoming invasion by conquering important ports and kingdoms in Maritime Southeast Asia.
[2]: 199 Among the few surviving relatives of Kertanegara was Raden Wijaya, who fled to Madura where he was sheltered by its regent, Arya Wiraraja.
Jayakatwang gave Wijaya land in the Tarik forest in Brantas delta, to build a village that was later called Majapahit, named from the sour beal trees that grow in the area.
The Mongol expedition of the Yuan dynasty sent by Kublai Khan departed from Quanzhou,[7] traveled past Champa and Karimata, and landed at the port of Tuban in early 1293.
[1][2]: 201 Jayakatwang's restoration of Kediri was short-lived, but the events of his reign would play an important part in the history of Java and Indonesia, especially in the rise of Majapahit under Raden Wijaya.