Polygon has published a walkthrough for the "Ace Archer: Nijo-jo Castle" side story in Onimusha: Way of the Sword, guiding players through the task of hunting down five flying Kubi Akari genma hidden around the castle. The mission is triggered by a man near the Gojo Street – West Spirit Mirror, who asks protagonist Musashi to use his special bow to eliminate the creatures that have appeared at Nijo-jo Castle. The guide is useful because the targets, though marked with notebook icons on the map, are often positioned outside easily explorable areas, making them tricky to spot and shoot without precise positioning.

The walkthrough details the exact vantage points needed to see and hit each of the five Kubi Akari, starting from the Nijo-jo Castle Entrance Spirit Mirror in the south. It covers spotting the first two near a bridge (one visible from the street, one hidden underneath), a third seen by climbing a ladder to look west, a fourth found by climbing onto a rooftop, and a fifth accessed via a ladder near the Nue Pond Spirit Mirror to the north. Each location requires the player to stand at a specific star-marked spot to get a clear shot at the target.