China said on Wednesday that it is "extremely dangerous and unattainable" for some forces in Japan to relate the Taiwan question to Ukraine and try to make a breakthrough in its relations with the island.

Speaking at a regular news briefing in Beijing, Foreign Ministry spokesman Wang Wenbin said China strongly rejects some Japanese political forces' blatant collusion with "Taiwan independence" forces and their irresponsible remarks on the Taiwan question. "China has lodged stern representations with the Japanese side," he said.

Wang made the remarks after Taiwan leader Tsai Ing-wen and former Japanese prime minister Shinzo Abe held a virtual meeting on Tuesday, during which they discussed matters including the Ukraine issue.

Wang reiterated that China firmly opposes all official interactions between Taiwan and any country that has diplomatic relations with China, and firmly rejects Taiwan's inclusion in any agreement or organization of an official nature.

The spokesman noted that the Taiwan question and the Ukraine issue are different in nature and not at all comparable, and he said that Taiwan is an inalienable part of China and the Taiwan question is none of Japan's business.

He also said that Japan committed grave historical crimes and has a debt to Chinese people for its innumerable crimes in Taiwan during its colonial rule over the region for half a century.

"We seriously urge certain politicians in Japan to reflect upon history, earnestly abide by the principles of the four China-Japan political documents and its commitments, and stop making any official contact with Taiwan's Democratic Progressive Party authorities and not to embolden the 'Taiwan independence' forces," he said.

Wang said China has noticed that since the outbreak of the Ukraine crisis, the DPP authorities have been manipulating the issue to mislead the public to support the "Taiwan independence" forces. But such an attempt is despicable and futile, he said.

"No matter what trick they play, they cannot change the fact that Taiwan is part of China, cannot stop the trend that Taiwan will return to the motherland and cannot change that the 'Taiwan independence' forces are doomed to fail," Wang said.

Zhu Fenglian, a spokeswoman for the State Council Taiwan Affairs Office, also criticized the irresponsible remarks made by some people in Japan on issues related to Taiwan, saying the remarks are "vile in nature".

"We urge these people in Japan to refrain from repeating their mistakes on Taiwan-related issues, to immediately correct their wrongdoings and to return to the right path of abiding by the one-China principle," Zhu said.