Higashiho Forging Special Yanagiba Knife 20cm

This is a Yanagiba knife from Higashiho Forging Works, with a blade length of 20cm. The total length is 34cm. Thickness

The back of the blade is engraved with Higashiho Special.
The steel type is unknown, but it appears to be some kind of steel as rust is present.

The blade has a slight curve to the left (Photo 5) and a minor chip (Photo 8).
Rust is present at the junction of the handle and the blade (Photos 6, 7).

Thank you for looking.