Maybe it was a group of babies who looked Medusa in the eye!
I think that those little rocks are images of Jizo, the guardian of children. Those who have lost their children, born and unborn, put the little aprons or caps on to represent the lost child. Have very much enjoyed your photos of Japan - and especially those of the sakura. Lovely.Mary
Thank you Mary. They were in a peaceful moss garden under a camellia tree.
I wondered if it was a variety of yarn bombing but seeing Mary's comment and given the fact that the bibs are all the same , could it be a tiny memorial for some poor couple's failed IVF attmpts ?