Here is the appraisal for the katana blade:

Hello,

Your item is a katana tang (nakago), which is the portion of the blade that extends into the handle. The visible mei (signature) is engraved on the nakago, and identifying the maker requires expertise in reading Japanese kanji and recognizing smith signatures. Given its condition and appearance, this piece appears to be an antique Japanese katana blade, possibly from the Edo period (1603–1868) or later.

Historical Context:

Japanese katana are traditionally crafted by swordsmiths, each leaving a distinctive signature on the tang. The mei typically includes the smith’s name and sometimes the province where it was made. The hole (mekugi-ana) in the tang indicates where the wooden handle (tsuka) would have been attached. The patina on the nakago suggests age, as older swords were left unpolished to develop a natural oxidation layer.

Market Value:

The valuation of a katana tang depends on several factors:
• Authenticity of the signature (mei) – If verified as an authentic signature from a notable smith, the value increases significantly.
• Blade condition – If the rest of the blade is intact and in good condition, the value is higher.
• Historical provenance – Swords traced back to renowned schools and samurai families fetch premium prices.