MOSCOW, Oct. 23 (CGTN) - Chinese and Russian navy conducted their first joint naval patrols in the west Pacific from October 17 to October 23, according to China's Ministry of National Defense.

The naval manoeuvres have been closely watched by Japan which said earlier this week that a group of 10 vessels from China and Russia sailed through the Tsugaru Strait separating Japan's main island and its northern island of Hokkaido.

"The group of ships passed through the Tsugaru Strait for the first time as part of the patrol," Russia's defence ministry said in the statement. The strait is regarded as international waters.

"The tasks of the patrols were the demonstration of the Russian and Chinese state flags, maintaining of peace and stability in the Asia-Pacific region, and guardianship of the subjects of maritime economic activities of the two countries," the ministry added.