SomeAussie

Hi, I got this sword from someone who claimed to have killed a Japanese Officer back in WW2 and brought it back to Australia with him. I asked a friend about the writing on these and he could only identify some of it which was on the small blade, he said it says something along the lines of Kunishige Bichu which did bring up some swords and some history. I believe it was a swordsmithing family from the 1700's that got passed down through generations but the sites translated very poorly to English. I don't believe the handguard belongs to this sword but it came with it anyway and the scabbard doesn't look like something from WW2. If anyone could help me out here it would be much appreciated. Cheers! Images were too large to upload so here's an imgur link