The National Public Safety Commission said Tuesday there have been 25 acts of vandalism and harassment against Chinese interests in Japan, including diplomatic missions and schools, reported since April 9, when the first wave of unruly anti-Japan protests took place in China.
The commission's chairman, Yoshitaka Murata, said that of the incidents reported up to Monday, Chinese diplomatic establishments were targeted in 14 cases, including a bomb threat made against a consulate, while 11 were against other Chinese-related establishments.
"Our country has a duty to provide solid security and protection for (China's) official establishments," Murata said. "We would like to see to it that (nothing wrong) happens to the Chinese people residing in Japan.
"I would also hope Chinese authorities provide safety and protection for Japanese people and businesses" in China.
On April 12, a man called a broadcasting company in Fukuoka saying there would be an explosion at the Chinese Consulate General in the city later in the day, Fukuoka police said.
The caller said he had planted 10 kg of explosives that would go off at 7 p.m., police said.
The consulate the same day also received a razor along with a letter of protest over the anti-Japan demonstrations in China, and a razor blade was also sent to another consulate in the city of Nagasaki, the Chinese Embassy said.
Police searched the consulate's premises and found no explosives, and are investigating the case as a malicious hoax.
On Friday, an envelope containing harmless starch-like white powder was sent to the Chinese Embassy in Tokyo in an apparent anthrax threat, police said over the weekend.
Also that day, a mailbox doorplate and intercom at the Tokyo residence of Chinese Ambassador Wang Yi were found sprayed with red paint.