China and Taiwan criticised Japan for giving Japanese names to disputed islands in the East China Sea claimed by all three parties in a long-running diplomatic row.
China and Japan have a lengthy dispute over an uninhabited but strategically coveted island chain known as Diaoyu in Chinese and Senkaku in Japanese.
Taiwan also claims the islands and local activists have tried to sail to the disputed area to press Taipei's claim.
China's foreign ministry on Saturday said moves by Japan to rename scores of islands in the chain was "illegal and invalid", according to a statement posted on the ministry's website.
"No matter what names Japan has given to the islands affiliated to Diaoyu island, it will not change the fact that these islands belong to China," Chinese foreign ministry spokesman Hong Lei said in the statement.
China's State Oceanic Administration has released names in Chinese for the islands in the chain, which it put at 70, the official Xinhua news agency said Saturday.
Separately, Taiwan protested to Japan for renaming four islets in the contested chain and unveiling the names on Friday.
Kanagawa prefectural police said Friday they have arrested four individuals in Ebina, in connection with a robbery case in which a pregnant woman on her way home was struck in the face and robbed of approximately 100,000 yen in cash. (Japan Today )
Yoko Ono says her own bitter experience in Japan during World War II inspired her to support WhyHunger's "Imagine There's No Hunger" campaign to fight childhood hunger around the world. (abcnews.go.com )
Japanese police arrested former sumo ozeki Kotomitsuki on Wednesday on suspicion of violating the immigration law by employing foreigners illegally at a barbecue restaurant he runs in Nagoya, central Japan. (Jiji Press )