The Three Sacred Treasures (三種の神器 Sanshu no Jingi/Mikusa no Kamudakara) are the imperial regalia of Japan and consist of the sword Kusanagi (草薙劍), the mirror Yata no Kagami (八咫鏡), and the jewel Yasakani no Magatama (八尺瓊勾玉).
There is no single portrait of this Genesis of Japan originating objects. However, many myths legends and stories. I tried to connect my own interpretation with the possible information and to get a possible realistic representation from it.
The mirror is designed very freely and is only to convince by glare, because he has lured so the goddess Amaterasu from her cave.
The jewels refer to the name, which is the shape of a part of jin and jang, or a komas.
The sword is made according to the reports of a monk who saw the sword in Edo time, and was the only one who left a description about it