TOKYO (AP) — Japan on Friday gave names to five uninhabited islets in an island group at the center of a territorial dispute with China as part of efforts to reinforce its claim, sparking quick condemnation from Beijing.

The five islands, named after directions of the compass, are part of the group in the East China Sea known as Senkaku in Japanese and Diaoyu in Chinese. Five bigger islands in the group already have names. Chinese and Japanese coast guard ships have regularly confronted each other in surrounding waters.

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