Kazuhiro Nogi/AFP
The vessels will be stationed at the regional coast guard headquarters which covers the Japanese-controlled
The 335-tonne "Kurose" and the 3,100-tonne "Chikuzen", equipped with a helicopter, will be deployed in August and October respectively, NHK reported.
On Sunday, Japan's Ground Self-Defense Force carried out the nation's first
Some 300 troops took part in the 40-minute drill with 20 warplanes and more than 30 military vehicles at the Narashino Garrison in Chiba, southeast of Tokyo.
Some 80 personnel from the SDF's First Airborne Brigade rappelled from helicopters with parachutes in front of some 11,000 spectators to demonstrate manoeuvres to counter an enemy invasion of a remote island.
"We will strengthen the deployment of the Self-
Chinese government ships and planes have been seen off the disputed islands numerous times since Japan nationalised them in September, sometimes within the 12 nautical-mile territorial zone.
Tokyo's defence ministry has said that F-15s were sent airborne to head off Chinese state-owned -- but not military -- planes four times in December, including an occasion when Japanese airspace was breached.
They were also mobilised in January, it said.
Japan plans to spend an extra 180.5 billion yen ($2.0 billion) on missiles, fighter jets and helicopters, an official said last week, as it tries to strengthen defence capabilities with concerns growing over a rising China.
The announcement came after Prime Minister Shinzo Abe's ruling Liberal Democratic Party said Japan would increase military spending for the first time in 11 years in the next fiscal year starting April.