Given such complicated circumstances, in which his father Emperor Kazan had Imperial Prince Kiyohito with Hirako's birth mother (namely, the grandmother of Prince Akinari), he and Prince Kiyohito were reared as children of their grandfather, the retired Emperor Reizei.
更に父・花山法皇が平子の実母（つまり昭登の祖母）と通じて清仁親王を儲けるなど余りにも複雑な事情があったために、清仁親王ともども祖父冷泉上皇の子として育てられた。