Although his father and mother are unknown, his grandfather, SHIMADA no Kiyota, (died November 5, 855 aged 77) came from a powerful local clan in the Owari Province.
父母は不明だが、祖父の島田清田（斉衡2年9月18日_(旧暦)、77歳で没）は、尾張の地方豪族の出身であった。