Date of sighting: April 24, 2011
Location of sighting: Sagami River in Kanagawa Perfecture, Japan
It started at 1:40 in the afternoon. Eyewitness Mr. Sato found the UFO in the western sky. He said at first he thought it was a helicopter. He began shooting photos when the UFO began to rise. As it rose up, it became more and more invisible.
If you look at the close up view of the UFO, you will notice that as it turned, two gill like wings, red in appearance, were on each side. Most likely used for navigation. The shape of the craft looks like a triangle with smooth edges. In the middle of two of the sides are the small wings. I wish there was more info about the sighting but the report at TUFOS was short.