Vintage Japanese? Porcelain Vase Lamp

I acquired this lamp several years ago... . To the color and the simple form. I am only speculating that it is Japanese. Based on the fittings and the felt bottom, I suspect the lamp dates from the '50s to '70s. I attempted to capture the glaze which is mottled and toward the bottom and barely visible because of the wood base the glaze ends leaving a narrow on glazed area. Would welcome views as to likely origin and comments on this particular glaze. Thanks!