BEIJING, March 24 (Xinhua) -- China is deeply shocked that a man claiming to be an active-duty officer of the Japan Self-Defense Forces (SDF) forcibly broke into the Chinese embassy in Tokyo by climbing over a wall in the morning, Chinese foreign ministry spokesperson Lin Jian said at a regular press briefing on Tuesday.

According to Lin, the man admitted that his act was illegal and he also threatened to kill Chinese diplomatic personnel in the so-called "name of god."

Lin said that China has lodged strong demarches and protests with Japan, adding that the incident is a serious violation of the Vienna Convention on Diplomatic Relations and posed a grave threat to the safety and security of Chinese diplomatic personnel and facilities. "The incident is egregious in both nature and impact."

The incident once again highlighted the danger of the rampant spread of far-right impact and neo-militarism in the country, the spokesperson said.

It also reveals the toxicity of the Japanese government's erroneous policies on vital issues concerning China-Japan relations such as history and Taiwan, and Japan's failure in maintaining discipline in SDF and in fulfilling its responsibility to protect the Chinese diplomatic and consular premises and personnel, Lin added.

The Chinese side urges the Japanese side to immediately conduct a thorough investigation into the incident, severely punish those involved, and provide a responsible explanation to China, Lin said.

The Japanese side must ensure the safety and security of Chinese diplomatic and consular premises and personnel, reflect on and correct its erroneous policies on China, and get rid of the root cause for such incidents once and for all, Lin said.

The international community needs to stay on high alert against Japan's accelerating rightward turn and loss of control inside the rapidly expanding SDF, the spokesperson added.