Jason 84

Thanks for the info guys, really appreciated, 👍 I've tried taking some more close up pics of the hamon, but I proving impossible to photograph, I hope these help

Hi all, can someone please help with any info about this sword? All I know about it is my grandfather brought it home from new Guinea during ww2 and said it was an officers sword, it has some inscription on the tang but im not sure of translation either a name katsunaga or maybe individual words as victory forever? I really have no idea any help would be much appreciated, thanks