Thanks y’all. I posted it under a Facebook group and was referred to Woody Hall. This is what he said.
Hello sir. Yes, the blade looks to be probably of the mid shinto era, (1650-1750’s) The shape of the tang denotes probably of a Mino or Kaga smith. If there is any inscription that would tell more. Also the the type of temper line would tell more of what era and smiths made it.
The handle is a Higo mounting from Kumamoto in Kyushu. They were noted for the type of fuchi kashira fittings (collar and pommel) that is of iron (from about 1750-1850) and lacquered leather or lacquered hemp cloth wrap.
Yes, I can see it does have a undelating temper line.
Blake m