Rubuta ci gaba don wannan sakin layi - Bayan kayar da Masarautar Melayu a Sumatra a 1290, Singhasari ya zama masarauta mafi iko a yankin. Kublai Khan, Khagan na Daular Mongol kuma Sarkin daular Mongol Yuan, ya ƙalubalanci Singhasari ta hanyar aika da jakadu don neman haraji. Kertanegara na Singhasari, ya ƙi biyan haraji, ya zagi jakadan Mongol, kuma ya ƙalubalanci Khan maimakon. A sakamakon haka, Kublai Khan ya aika da rundunar jiragen ruwa 1000 zuwa Java
a shekara ta 1293.