Some articles on okiagari:

Daruma Doll - Physical Features and Symbolism - Shape
... In Japanese a roly-poly toy is called okiagari ... The tumbler doll style is similar to an earlier toy called the Okiagari Koboshi, the little self-righting monk which was popular in the Kinki region ... The original okiagari toy, however, is said to have been introduced from Ming China around 1368-1644 ...