These handmade dolls are called "Teru-teru bozu", which literally means " shine- shine doll". They are very popular dolls hanging out the window with a wish for good weather. Now most Japanese lands are in the middle of rainy season. And heavy rainy days have continued these few days.
I found them in Hakata, which is famous for its exciting festival called Gion Yamagasa held next week. I understand people wish for good weather for the festival days.
I hope the weather will be good tomorrow.