Also known as: てるてる坊主, 照る照る坊主, 晴天娃娃, 扫晴娘
A Japanese Doll hung by the window to bring about the change of weather. Hanging it right-side-up acts as a prayer for fair weather, while hanging it upside-down acts as a prayer for rain.
Sometimes the face is drawn as a Henohenomoheji, a doodle made of hiragana characters.