10. How to make ancient Japanese coins?
Ancient Japanese coins were all cast as opposed to western coins that were punched out to produce blanks and then they are pressed with a pair of dies, leaving images on both sides of coins.
In case of "Wado-Kaiho" or "Wado-Kaichin" (708 AD), molten bronze were poured into an earthen mould. It was taken out of the mould after the bronze being cooled and hardened. Then tree-like bronze called “Eda sen” were obtained. Leaf-like bronze coins were cut out of “Eda-sen” and the edges were polished to produce complete bronze coins.