Hello.
The Highland Games - from which the modern Olympics descends, still has rock and stone throwing contests. It is thought that some of these events sprang forth in the guise of a game but were actually warfare training when weapons were banned. It is the same with Karate weapons (nachaku etc) they arrived as weapons when swords etc were banned in Okinawa.
Don't know how this helps but there you have it.
Thanks.
Stooges