The year after he was named Sonoike no kami (director of gardens and ponds), and in 774 he was first made Izu-no-kuni-no-kami (the governor of Izu Province) and then Izumo no suke (the assistant governor of Izumo province); after this point no further mention is made of Oi in the historical record.
翌年に園池正、宝亀5年（774年）に伊豆国守、出雲国介を歴任したところで、子老の記録は途切れる。