"The Chinese side is seriously concerned and we have lodged solemn representations to Japan," Foreign Ministry spokesperson Hua Chunying told a press briefing.
Hua reaffirmed that the Diaoyu Island which Japan calls Senkaus and its adjacent islets have been an inherent part of Chinese territory since ancient times.
"No matter how Japan tries to propagandise its wrong position on the islands, it will never change the fact that China has sovereignty over them," Hua said.
She said the substantial deletion exposes Japan's reluctance to face up to history, "which is a dangerous signal."
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In the latest review, a total of 259 textbooks were given approval out of 261 that took part in the process, according to the Ministry of Education, Culture, Sports, Science and Technology.
"We urge Japan to reflect on its militarist aggression, educate its younger generation correctly, and improve ties with its neighbors through practical action," Hua said.