Ōsumi (former province located in the east of present-day Kagoshima Prefecture, including the Amami Islands)
in every nook and corner; from A to Z; from head to toe; from cover to cover
four corners; four ordinal directions
left-hand corner; lower left
internal angle of two walls, planes, etc.
external corner angle of two walls, planes, etc.
hepatica (Hepatica nobilis var. japonica); liverleaf
angle (corner) block; angle rafter
sumiotoshi (judo); corner drop