In Kyushu at the time, Takemitsu KIKUCHI of the Nancho (Southern Court of Japan) was dominant in power, so Ujitoki (who was on the side of Northern Court of Japan) cooperated with Yorinao SHONI to fight against KIKUCHI's army.
当時の九州では南朝(日本)勢力の菊池武光の勢力が強かったため、北朝(日本)側の氏時は少弐頼尚と共同して菊池軍と戦った。