Owned by a hermit, Unchushi (雲中子), who lived in Mt. Shunan, Shoyokyo was Paopei (a weapon for senjutsu (the supernatural art of a hermit)), and it could reveal the original shape of the ghost disguised as a human.
終南山の仙人・雲中子の宝貝（パオペイ。仙術の武具）で、人に化けた魔物の正体を看破することができる。