Unusual Old Vintage Japanese? Wood Plane

Unusual Vintage Japanese? Wood Plane
I found this old wood plane at an estate sale. I'm guessing it's Japanese but only a guess. Maybe Korean. The wood base measures 10" x 2-3/4". The wood is very heavy. Not sure what type of wood it is but definitely a hardwood. I took pics of the different symbols on the back of the blade.
I would be happy to combine shipping on any of my auction items.
Good luck on this very cool old Asian plane.