Sashigane

Sashigane, a Japanese logic puzzle, involves dividing the grid into L-shaped regions. Each region must be shaped like a carpenter’s square.

Rules: Divide the grid into L-shaped regions along the grid lines. The two legs of the L must be exactly one square wide.
A circle marks a cell where an L must turn. A circle does not mark all turn cells.
A number in a circle indicates the number of cells in the L region.
An arrow marks the end of an L-leg, with the arrow pointing in the direction of the turn cell.