Japanese are worried about NK and its behavior; NK used to dump testing missiles in Japan's sea. that's why they are agitated about these things.
I think it's really a Mooring Buoy - Steel. These come in 58" spheres (very close to the stated 1.5m) and weigh 300kg. These are either hollow or foam filled.
UFO can stand for many things...In the lab we refer to Unfertilized Oocytes as UFOs. Then there's apparel for "Under Fourteens Only"...UFO stands for "Unidentified Flying Object." It refers to any object or phenomenon observed in the sky that cannot be readily identified as a known or conventional object
ඒ වගේ මටත් පෙන්නේ.boya ekak newida