Japanese Akizuki-class destroyer JS Suzutsuki (DD 117) arriving in Qingdao in China's eastern Shandong province.
The Japanese Akizuki-class destroyer Suzutsuki, pictured here in 2019, sailed into Chinese waters on July 4 for about 20 minutes.
  • Japan is investigating one of its naval destroyers after it sailed into Chinese waters near Taiwan.
  • Japanese media reported that the incident occurred on July 4 as China conducted live-fire drills.
  • Authorities say it might have been a mistake, but are still questioning the warship's captain.

Japan's defense ministry is investigating officers of a naval destroyer that entered Chinese territorial waters for about 20 minutes on July 4, according to local reports.