On all sides of Koniuji Island except the south and southeast, the shoreline is sheer and precipitous, rising to two sharp summits of and . The south side of the island, above lower bluffs at the shore, slopes gradually to a ridge about north, and drops off again into a ravine that passes through the island at some elevation. The slope up from the south side is grass covered. The northwest end of the island is a low, flat, rocky point about long. An extensive kelp patch extends from the south of the island. Also, in the summer, heavy kelp is found along and well off the western shore.