In fact, besides using agricultural methods like those found in Malaysia and Indonesia, the Peinan people employed stone coffins similar to those found in parts of the Southeast Asia. It is thus speculated they may have come to Taiwan following ocean currents from this region.
「卑南」時代的居民除了在農耕方法上與南洋土著相近外，岩板棺也和菲律賓巴丹一帶相仿，因此有人推測他們可能是由南洋群島，順著黑潮北來的，與今天的山跑也可能有文化上的淵源。