The video, which appeared on a channel approved by the CCP, singles out Japan as the one exception to China’s policy to not use nuclear weapons against non-nuclear powers.
"We will use nuclear bombs first," the video said. "We will use nuclear bombs continuously. We will do this until Japan declares unconditional surrender for the second time."
The CCP claims that it will "liberate Taiwan," and it warns against Japan deploying "one soldier, one plane or one ship."
The threats follow comments made two weeks ago by Japanese officials about Taiwan’s sovereignty, with Deputy Prime Minister Taro Aso saying that Japan must "defend Taiwan," The Japan Times reported.
"If a major incident happened (over Taiwan), it’s safe to say it would be related to a situation threatening the survival (of Japan). If that is the case, Japan and the U.S. must defend Taiwan together," Aso said.
However, Aso insists that Japan would resolve any issue through dialogue. Chief Cabinet Secretary Katsunobu Kato said that a Taiwan contingency is a "hypothetical situation."
China Ministry of Foreign Affairs spokesperson Zhao Lijian urged Japan to adjust its "mentality" over the issue, Sky News Australia reported.
"We once again urge Japan to approach the relevant issues with the right mentality, and show its respect for China's sovereignty and sincerity in upholding regional peace and stability," Lijian said.
"I must stress that, Taiwan is part of China and the Taiwan question is purely China's internal affair," Lijian added. "China never allows interference in the Taiwan question in any form by any country."
Lijian stressed that Taiwan is part of the Chinese plans for reunification.