According to the above date, he would have been 56 years old when he went to Suruga and became lord of Kokokuji-jo Castle and had his oldest son Ujitsuna, and 62 years old when he led his troops into battle at Izu.
これだと、駿河に下向して興国寺城主となり、長男氏綱が生まれた時点で数え年で56歳、伊豆討ち入りの時点で62歳となる。