The uprising Omi-Genji occupied Lake Biwa that was the main artery for distributing goods between the Hokuriku Region and Heian-kyo (the ancient capital of Japan in current Kyoto) and seized nengu (land tax) on the way from the Hokuriku Region to Heian-kyo.
蜂起した近江源氏は北陸地方と平安京を結ぶ物流拠点である琵琶湖を占拠し、北陸から都へ上る年貢を差し押さえた。