However, according to the surviving fragment of "Chikugo no kuni fudoki," Iwai escaped to Kamitumike no agata in Buzen Provicne, and then died in mountains there (the Yamato army had lost the track of Iwai, though).
ただし、『筑後国風土記』逸文は、磐井が豊前の上膳県へ逃亡し、その山中で死んだ（ただしヤマト軍はその跡を見失った）と記している。