There are three mirrors, 'Keisho sannen' (the third year of Keisho) mirror discovered in Kanbara-jinja Shrine kofun Tumulus in oaza (an administrative unit) Kanbara, Kamo-cho, Unnan City, Shimane Prefecture, the same form of 'Seishi (Wei) gannen' (the first year of Seishi) mirrors discovered in Kanizawa-kofun Tumulus in Kanizawa, Shibasaki-machi, Takasaki City, Gunma Prefecture, Morio-kofun Tumulus in aza Ichio, Morio, Toyooka City, Hyogo Prefecture and in Gokaroyashiki-kofun Tumulus in Takeshima Island, Shunan City (the former, Shinnanyo City), Yamaguchi Prefecture.
島根県雲南市加茂町大字神原・神原神社古墳出土の「景初三年」鏡、群馬県高崎市柴崎町蟹沢・蟹沢古墳、兵庫県豊岡市森尾字市尾・森尾古墳、山口県周南市（旧新南陽市）竹島御家老屋敷古墳の三古墳から出土した同型の「正始(魏)元年」鏡三面である。