"Right plant, right place" is a wise gardening adage. Japanese Anemones can be a good choice for a dry, semi-shady spot. However they can be a bit too right and spread considerably by rooty rhizomes. In this case a well established stand was spreading from a border into an adjoining shingle path.

 I dug up them out of the shingle to replant in another border with similar conditions. Actually this propagation by division is recommended as a spring thing but needs must. They may or may not flourish; hopefully they will be the right plant for that place.