Claims of UFO (unidentified flying objects) sightings keep surfacing amid debates on existence of aliens. Now, 10 strange bright objects have been caught flying in the skies of Osaka city in Japan.

In the viral video uploaded on YouTube by several Japanese TV channels, as many as 10 bright objects are seen quickly passing the skies of Osaka in broad daylight. It light up the skies, making viewers wonder what they possibly could be.

"Footage captured of strange white objects floating over Japan. Could they be UFOs? The 10 white circular balls floating in the sky above Osaka are quick moving and dance around in the two-minute long video," reads the description of a video uploaded by TVE24HD.

Many viewers are of the opinion that they could be either swamp gas or balloons.

"If you want to record a UFO, all you need is a really $hit camera ..... so whatever you record will look like a UFO. How smart is that !!!" wrote a viewer.

"Ball lightning or related atmospheric phenomenon...which is AMAZING! Everybody thinks they are aliens, but they are not," wrote another.

"They're called balloons...and you'd know that if the person filming used their zoom function," wrote another viewer.

However, conspiracy theorists are quick to claim that they are spaceships, and claimed that they are proof of existence of alien life.

"Regardless of wind vortexes, gusts or any other natural flow of air a few suggested, these objects are not consistent with balloons. Balloons rise "upwards" consistently throughout their release. These objects do not as some moved downwards to a lower ceiling while most remained at the same ceiling throughout the video," wrote a viewer.

"One of them even goes from a mid-position and passes the front balloon while remaining within a fairly linear path as the other objects, thus any wind impacting a single object would impact the others even if not in the same way/direction (push, rise or spin)."

It may be recalled that a similar sighting was reported a few weeks ago with three alien spaceships reportedly escaping the earth's atmosphere in the video captured from NASA live feed.

The video titled "UFO Mysteries: UFOs, Angels Or Biological Creatures Seen Leaving The Earth?" uploaded on YouTube by Mister Enigma led to debate among viewers with some claiming that it's alien's spacecraft.