Before 660 BC

Jindai moji or Kamiyo moji (Japanese: 神代文字 “characters of the Age of the Gods”) are characters said to have been used in ancient Japan. Some have claimed since the mid-Edo period that such ancient characters, for example such as Chikushi characters and Hokkaido characters, have been found in archeological remains, in Kofun and on mountain.

But all jindai moji are generally considered to be forgeries. No earthenware with such characters has ever been found.

In spite of this, most of the Shinto shrine facilities, such as the go-shintai (御神体, "sacred body of the kami") and stone tablets, will have the Jindai moji.

Some Jindai moji are even used on sold amulets. Ninjas of the past used it to write secret documents or ninja secrets, even using it as a code word.