Fast-forwarded sunrise shot on the coast of Okinosu in Tokusima prefecture.
From fall to winter, when the sea surface is exceedingly warmer than the cool layer of air above it, the temperature difference causes a mirage. Just as the sun rises above the horizon, a second sun appears, forming the shape of the Greek letter omega (Ω). This phenomenon can only be seen under certain conditions, and is thought to bring good fortune to the lucky observer.