There are many articles of genealogy in 'Kojiki' and 'Nihon Shoki' that were created and it is possible that 'Okisaki' who do not have 'konintan' (tales of marriages) with the 'Okimi' were actually sisters.
なお、古事記、日本書紀の系譜記事には造作が多く、大王との婚姻譚の記載のない「オオキサキ」については、実際には姉妹等である可能性がある。