The ancient artifacts include flat throwing stones that may have been precursors of the throwing star and a spiky weapon made of clay aimed at injuring the feet of enemies and horses.

Related: 10 stunning swords and other ancient weapons This photo shows 430 year-old artifacts that may be crude weapons associated with the ninja. (Image credit: Courtesy of Hachioji City History ...

Karate is one of the new sports added to the Olympics for the first time at the Tokyo Games. The sport traces its roots to Japan where it was developed 700 years ago.

The flattened stones and spiky clay balls had languished in two Japanese museum collections for decades. But when Akihiro Iwata came across them in 2019, the Japanese archeologist and curator was ...