Goshu Province

Ōmi Province (近江国, Ōmi no kuni) is an old province of Japan, which today comprises Shiga Prefecture. It was one of the provinces that made up the Tōsandō circuit. Its nickname is Gōshū (江州).

Lake Biwa, Japan's largest lake, is located at the center of the province. "Ōmi" came from awaumi or "fresh-water sea" and the kanji of "Ōmi" () means "an inlet near the capital" (See also Tōtōmi Province).

The ancient capital was near Ōtsu, which was also a major castle town. In north of Otsu, one of the most important monastery Enryaku-ji is located on Mount Hiei.

Hōjō Tokimasa, the first shikken of the Kamakura shogunate, was made daimyo of Ōmi Province in the 10th month of Shōji 2 (1200).

During the Sengoku period, the northern part of the province was the fief of Ishida Mitsunari, Tokugawa Ieyasu's opponent at the Battle of Sekigahara, although he spent most of his time in Osaka Castle administering the fief of Toyotomi Hideyoshi's young son. After Ishida's defeat, Tokugawa granted the fief to his allies, the Ii clan, who built the castle and town of Hikone from the ruins of Sawayama.

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