Chinese mainland's Taiwan affairs authority released a statement on Friday to rebuke former Taiwan leader Lee Teng-hui's "absurd remarks" such as "Taiwan and Japan were a same country."
Lee, 92, also alleged that the comfort women issue had been settled and the 1992 consensus centering on the one-China principle was a fabricated formulation.
"These absurd remarks have seriously distorted the facts and blurred out the important contributions made by the Taiwanese compatriots to the victory of the war against the Japanese invaders," according to the statement from the Taiwan Affairs Office of the State Council.
Lee is trying to defend the Japanese imperialists' crimes and has challenged the "moral bottom line of human beings," the statement said.
Lee, also former Kuomintang chairman, is known for his pro-Japan and Taiwan-independence stance.
The statement said Lee has not for once engaged in separatist activities, adding "traitors will never meet a good end."