In 1679, he became naturalized in Japan through the permission of the Nagasaki bugyo (Nagasaki magistrate) and took the name Oga after his birthplace in Fujian Province.
延宝七年（1679年）には長崎奉行に許されて日本に帰化し、福建の出身地から鉅鹿（おおが）姓を名乗った。