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.
Fewer than 40 pct of residents and commuters in Tokyo take specific measures to prepare for a possible huge earthquake beneath the Japanese capital, despite high awareness on disaster prevention, a Metropolitan Police Department survey showed Friday. (Jiji Press )
The man under arrest for fatally stabbing one man and wounding three others during a 10-minute rampage in Kashiwa, Chiba Prefecture, on Monday night, told police on Thursday that he wanted to hijack a plane at Haneda airport and fly it into Tokyo Skytree to take revenge on society. (Japan Today )
The man lauded as "Japan's Beethoven," who has admitted he never wrote his compositions, appeared before cameras for the first time since the scandal surfaced - clean-shaven and minus his trademark sunglasses. (abcnews.go.com )
The 24-year-old suspect in the murder of a man on a street in Kashiwa, Chiba Prefecture, on Monday is believed to have posted a profile online in which he identified himself as a "celeb NEET," meaning a celebrity without a job, according to local online news site J-Cast News. (Japan Times )
The proportion of single nonregular Japanese male workers in their 20s who have girlfriends stood at 18.7 pct in 2012, against 30.7 pct for regular employees, a government survey revealed Thursday. (Jiji Press )