According to a legend, Eshinsozu saw Lake Biwa from Yokawa Tower on Mt. Hiei and wondered at the light in the lake shining every night, so he sent someone to pick it up by net.
伝によれば、恵心僧都が比叡山横川から琵琶湖をながめると、毎夜、その光明の赫々（かくかく）たるを怪しみ、網でこれを掬（すく）いとらせた。