In June 1592, while defending the city of Yongin near Hanseong, he was attacked by a huge force of 50,000 Korean soldiers led by the governor of Jeolla Province, Yi Gwang but, using an opportunity to attack at night, forced the Korean army to retreat.
文禄元年（1592年）6月に漢城近郊の龍仁を守備中に全羅道観察使の李洸などが率いる朝鮮軍約5万の大軍により攻撃を受けるが、機を制して夜襲を行い朝鮮軍約5万を潰走させた。