The Chinese Foreign Ministry confirmed on Friday that a Japanese citizen was under investigation for national security violation.
Spokesperson Hua Chunying made the announcement during a daily press briefing.
According to Japan's Kyodo News, a Japanese man in his 60s was detained by Chinese authorities in northeastern Liaoning Province in May.
"In accordance with the law, the relevant Chinese department investigated a Japanese citizen in May on suspicion of harming China's national security," Hua told reporters.
China has notified the Japanese consulate in accordance with the bilateral consular agreement, she said.
(Source: Xinhua)