In another theory, Otsu faced Lake Biwa and had access both on land and over the lake, such as Tosando Road and Hokurikudo Road, leading to various districts, which was also convenient to go westward.
大津は琵琶湖に面しており、陸上・湖上に東山道や北陸道の諸国へ向かう交通路が通じており、西方へも交通の便が良いためだ、とする説がある。