It evokes mystery iron ballsa that has been washed into Japan beachwith authorities admitting they have no idea what it is – only that it’s not going to explode.

According to his publication Guardian the orb, about 1.5 meters in diameter, has been at the center of fevered speculation since it washed up on Enshu Beach in the city of Hamamatsu on the country’s Pacific coast, local media reported.

Her discovery caused several scenarios. Is it… a spy balloon, a UFO or maybe a ball from the popular manga series ‘Dragon Ball’?

According to the Guardian, experts used X-ray technology to examine the interior of the object and found it to be hollow.

Also, so far what is known is that it is not a “stray mine” and according to the British newspaper, there are no indications that the bullet is a spying tool from North Korea or China.

The presence of two raised handles on the sphere’s surface—suggesting that it might be hooked to something else—prompted a more prosaic explanation: that it was a mooring buoy that had simply come loose and drifted away.

Police began inspecting the orange-brown ball after a local resident spotted it on the sand a few meters from the shore while taking a walk earlier this week, Japan’s Asahi TV reported. .

Officers cordoned off the area and called in explosives experts dressed in protective clothing to investigate further, but reports say authorities still don’t know what the bullet is or where it came from.

Images have been sent to the Japanese Self-Defense Forces and Coast Guard for further examination.

A local who regularly runs on the beach said he did not understand why the ball had suddenly become the center of attention. “He’s been there for a month,” he told public broadcaster NHK. “I tried to push it, but it wouldn’t budge.”

Police cordoned off a 200m radius around the ball while experts tried, unsuccessfully, to solve the mystery.

Television footage of the object sparked speculation on social media, with Japan saying it “strongly suspected” that several Chinese spy balloons had been spotted over its territory in recent years.