Since soryo and oho mikoto mochi were the same post (provincial governor-general) in different writing, it is assumed that Ishikawa no okimi at least ruled Kibi Province (later Bizen Province, Bicchu Province, Bingo Province and Mimasaka Province) and Harima Province as the provincial governor-general (oho mikoto mochi) of Kibi Province (the soryo of Kibi Province).
総領と大宰は同一の役職の別表記と考えられているので、石川王は吉備大宰（吉備総領）として少なくとも吉備国（後の備前国・備中国・備後国・美作国）と播磨国を治めたと推測できる。