In the Sengoku period (period of warring states), there was Suigunshu (warriors battle in the sea) called Katata Navy in Katata, and Katata was regarded to be an important foothold by Nobunaga ODA who aimed at the unification of Japan with setting Azuchi-jo Castle as headquarter.
戦国時代(日本)、堅田は堅田水軍と呼ばれる水軍衆がおり、安土城を本拠として天下布武を狙う織田信長にとっては、堅田は重要拠点と見なされていた。