In a move likely to cause a stir in Taipei, Japan’s two biggest airlines are now calling Taiwan “China Taiwan” on their Chinese-language websites. However, the description is still  “Taiwan” on their non-English websites.

The carriers said they had not received any negative feedback from the government of Taiwan, but Japanese public broadcaster NHK reported that the foreign ministry would make a complaint through Japan’s de-facto diplomatic mission in Taipei.

The move is controversial because Beijing considers the self-governing territory a renegade province of China.

“We made the judgement [to change the name] while consulting and reporting to the transport ministry and foreign ministry,” said a Japan Airlines spokesman. “We chose a description that is easy to understand and acceptable for users of our websites.”

An All Nippon Airways spokesman said the move was intended to make it “easy to understand and acceptable for customers when they use our websites.”