Taking this into consideration, it is possible that with a comparison to 'a branch of pine,' the Komatsu clan, which had been brought under MINAMOTO no Arimitsu's umbrella, was engaged in the construction of the Miyoshi-jo Castle.
これを念頭に置けば、源有光の傘下に入った小松氏一族が「松の小枝」の例えで三蘆城築城に関わったと考えられるのではないだろうか。