The knife is a great heirloom. You may have to take this to a dealer to decipher the lettering and determine it's origin and value. My grandfather brought back Samurai swords back from Japan but got rid of them for safety reasons.
I think he was a little tense by my saying, " there can be only one " while holding them.
Don't take it to Rick Harrison of pawn stars as against his better judgment, Rick would give you .99 cents for it.
Either way, the knife is in fine shape.