Pill shaped black in color, about 10 feet long. Made no noise as it followed a helicopter. My family and I are staying in Japan for the summer, near Fukuoka and Kurume in the city of Tanushimaru Machi.
We were riding our bikes along the path, as seen on the map when I stopped to just take a sweeping shot of the surroundings. That is when I saw a helicopter being followed by a black pill shaped object. Only the helicopter made noise as the object flew just behind it. My viewfinder on my camera just broke the other day, so I did not know that I was zooming just above the UFO. I filmed till I could not see it any more. The object following the helicopter was not another helicopter. It was smaller ( around 10 feet long) and shaped like a pill.
You can see the object at around 5 seconds into the video and then again a few moments later.