Arrow or Harpoon identification - Taiwan? Phillipines?

[majacobson]

I recently bought a group of items that included this arrow. Most of the things were associated with Taiwan indigenous groups (such as an Atayal quiver) but neither the seller nor I could identify this arrow/harpoon.

Taiwan indigenous? From the Phillipines? The basket that holds the metal tip in well done and interesting.

Any leads appreciated.