Sai

The sai (釵) is a traditional piercing melee weapon used in Okinawa.

The basic form of the weapon is that of a pointed metal baton, with two curved prongs projecting from the handle.

Before its arrival in Okinawa, the sai was already being used in other parts of Asia, particularly Southeast Asia.
These nations included India, Thailand, China, Vietnam, Malaysia, and Indonesia.
It may have been brought to Okinawa from one or several of these places simultaneously. 

Silat practitioners typically refer to the sai either as chabang in Indonesian or tekpi in Malay.

Attribution: Wikipedia