Because Sankakubuchi Shinjukyo Mirrors were discovered mainly in the Kinai region, many researchers advocating the Yamatai-Koku kingdom in the Kinai region maintain Himiko's mirror and many researchers advocating Yamatai-Koku kingdom in Kyushu region maintain the mirrors were produced in Japan.
三角縁神獣鏡が畿内を中心に出土することから、卑弥呼の鏡説をとるのは邪馬台国＝畿内説をとる研究者に多く、日本製説をとるのは邪馬台国＝九州説をとる者に多い。