If, however, Josui was indeed serious about seizing supreme power, it would have required a thorough consultation with his son Nagamasa and, considering Josui's finess, it seems more puzzling than being dismissed as an oversight.
しかし、本気で天下を取ろうとしたのであれば息子の長政と綿密な打ち合わせが必要であり、それをしなかったのは如水の手腕を考えれば手落ちというより不審である。