"I have seen the Japanese Ambassador in India really wants to support India. I want to remind him not to randomly make comments before clarifying relevant facts," Chinese Foreign Ministry spokesperson Hua Chunying said.
"In the Donglang (Doklam) area, there is no territorial dispute. And the boundary has been delimited and recognized by the two sides," Hua said.
"And the attempt to change the status quo by trespass in the boundary is of India, not China."
Japan is the first country to openly speak on the crisis and back India.
Hua again asked India to immediately withdraw troops from Doklam, where both sides have been engaged in a stand-off since June.
She said India's unconditional pullback will be the basis for any meaningful dialogue to resolve the crisis, which has plunged ties between two countries to a new low.