The South Korean Defense Ministry on Tuesday said Tokyo failed in talks the previous day to provide definitive evidence backing its claim that a South Korean warship locked its radar on a Japanese plane.

Speaking at a news briefing, ministry spokeswoman Choi Hyun-soo also said that during Monday's talks Japan demanded to see radar data of the destroyer as a condition for disclosing some information of its own in connection with the incident last month. She criticized the request, calling it "extremely rude."

In the meeting "Japan did not disclose the radar frequency data that it has about our warship ... and instead only asked for information from South Korea. Such a demand is extremely rude and unacceptable," Choi said.