This is a Yuminoyaki tokkuri (sake bottle). I'm not sure of the exact age, but I believe it's old. There is writing on it, and I can read "Takeo Yumachi," but I can't decipher the rest of the characters. Also, as shown in the last three photos, there are old chips on the mouth. I checked for leaks by filling it with water, and there were none. Please check the photos for the size and other details.