The Shigaraki Palace (紫香楽宮, Shigaraki-no-miya; also written 信楽宮) was an imperial palace built by Emperor Shōmu, initially as a villa, later named by himself as the capital of Japan in 744 AD. It was located in Kōka District of Ōmi Province in what is now part of the city of Kōka, Shiga Prefecture, Japan. The capital-palace is also referred to as Kōka Palace (甲賀宮, Kōka-no-miya) in the Shoku Nihongi. Its ruins were designated a National Historic Site of Japan in 1974.
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