Tokyo: Japan is considering releasing evidence to prove that China aimed a weapon targeting radar at a Japanese ship near the disputed islands.
Beijing had earlier denied any such allegations made by Japan and had maintained that it was using ordinary surveillance radar.
"The government is considering the extent of what can be disclosed," Kyodo news agency quoted Japanese Defence Minister Itsunori Onodera as saying.
Japanese Defence Minister Itsunori Onodera said the incident happened on January 30 near islands claimed by both nations in the East China Sea.
"On 30 January, something like fire-control radar was directed at a Japan Self-Defence Maritime escort ship in the East China Sea," Onodera told the media.
The two countries are locked in serious hostilities over the eight uninhabited islands, mostly rocks which lie close to strategically important shipping lanes.
They also believed to contain rich fishing grounds and plush with oil deposits. This incident may heat up things in the East China Sea and may have substantial effect on the future of the bilateral relations between China and Japan.