The Chinese Foreign Ministry Tuesday deplored a Japanese lawmaker's visit to China's Taiwan, calling the move "egregious."

According to reports, Keiji Furuya, a Liberal Democratic Party lawmaker of Japan and chairperson of the Japan-ROC Diet Members' Consultative Council, is in Taiwan for a visit from August 22 to 24 and will meet Tsai Ing-wen.

Furuya has visited the Taiwan region of China in disregard of China's stern démarches, which grossly interferes in China's internal affairs, blatantly violates the one-China principle and the spirit of the four China-Japan political documents and sends a seriously wrong signal to the "Taiwan independence" separatist forces, a spokesperson of the Chinese Foreign Ministry noted in a statement.

The spokesperson added China will take resolute and strong measures to defend national sovereignty and territorial integrity.

Noting Taiwan is an inalienable part of China's sacred territory, the spokesperson warned that the Taiwan question bears on the political foundation of China-Japan relations and the basic trust between our two countries.

"The Japanese side made a solemn commitment on this question to the Chinese side," the spokesperson pointed out.

Japan once kept Taiwan under its colonial rule for half a century, the statement read, adding Japan is historically responsible for its serious wrongdoing to the Chinese people and has all the more reason to be prudent in its words and deeds.

The spokesperson also mentioned certain Japanese politician, to seek selfish political gains, has colluded with the "Taiwan independence" forces to make a political stunt just like some others have done.

The Japanese government connived at such political manipulation to undermine China's sovereignty and territorial integrity, the spokesperson added.

"Such behavior of reneging on one's commitment with sinister intention is doomed to fail and will not stop the historic process of China's complete reunification," said the statement.

The spokesperson urged the Japanese side to deeply reflect on the events of history, abide by the principles of the four China-Japan political documents and the commitments it has made, stop making provocation and stop stirring up trouble on the Taiwan question.

"Japan must not wade in muddy water and seek selfish gains in the Taiwan Straits," the spokesperson stressed and warned Japan not to go further down the wrong path.

The Taiwan Affairs Office of the State Council on Tuesday also expressed firm opposition to the Japanese lawmaker's visit.

Spokesperson Ma Xiaoguang urged the Japanese side to have a deep reflection on history, value the great sensitivity of the Taiwan question and act prudently on the Taiwan question.

Ma also warned the Democratic Progressive Party that provocations in collusion with external forces to seek "Taiwan independence" will be doomed to failure.