He was believed to be the same person as Genbu Jakko, the Second Ranking Commander-in-Chief who was sent from Koguryo (Korea), an area allegedly linked to the Koguryo Royal Family that has been mentioned in the Nihonshoki.
高句麗王族とされる日本書紀に記述がある高句麗から派遣された、大使の二位・玄武若光と同一人物とされてるいる。