The Chinese embassy in Japan has lodged a protest to the Japanese government, after the embassy and the consulate had been harassed over the past week.

The residence of the Chinese ambassador to Japan located at Tokyo's Minato Ward was molested late Friday, with its doorplate, mailbox and interphone sprayed with read paint.

On Friday afternoon, the Chinese embassy in Japan received an anonymous envelop with white powder inside. Japanese police said the white powder turned out to be starch and it was a hoax, but they were investigating the incident.

On Wednesday, an envelope containing a razor blade was sent to the Chinese embassy.

On Monday, the Chinese consulate in Osaka received a letter of intimidation, with shells of pistol bullets in the envelope.

The Chinese embassy in Tokyo and the Chinese consulate in Osaka have been harassed by drastically increasing nuisance calls since Sunday.

No organization or person has so far claimed responsibility for the incidents.