spearpoints set into a hilt are an indonesian item as far as i've seen, a search on 'tombak' will provide a lot of info. most have pamor (laminated steel/nickle patterning) when etched in the traditional arsenic based etchant. hilts vary from plain, like mine below to very fancy, as do the spearpoints themselves.
the ivory on yours could do with a better photo as detail is unclear. the pommel gold work does look a bit japanese, tho the spearpoint itself does not to my amateur eyes.japanese stuff is sorta out of my area.