Almost bid on that one myself. It's an oddball and opened cheaply.
Had other irons in the fire tho. The Dutch are fond of clip pointed swords, so may have been a Dutch East Indies area marriage. guard look dished like a Chinese one, tonku looks odd, grip is round like Burmese/Thai Dha/Daab, raised rim bits of wood over brass are odd, and the loop on the pommel may have been for a sword knot or tassel. All in all - unusual. Probably WW2, doubt it was in any way japanese military. Police maybe?