Each of the lamps on the Oike Lake’s surface floats autonomously. When a person stands still near a lamp, or when the wind blows a lamp, it shines brightly and produces a tone. The light of that lamp spreads to nearby lamps one by one, as they resonate with the same tone, continuing on to the trees on the islet in the center of the lake. If light approaches from the other side it signifies the presence of people there, making people more aware of the existence of others in the same space.

When the wind is not blowing and people are not nearby, the lamps begin to blink slowly.