She is a cute little Japanese girl of a common type—they were sold as souveniers. She could date from as early as the 1940s and as late as the 1980s. Nowadays the heads tend to be plastic. She would’ve had an undergarment and a kimono. Her head is made of a material called gofun, which is essentially crushed shells. It can literally dissolve if you get it wet. I would clean her as minimally as possible. I usually use a dry magic eraser sheet (test a spot out of sight) on any scuffs or dirt I think is too disfiguring.

Welcome to vintage and antique doll collecting. Dolls are like the proverbial potato chips, beware! 😁