Japan detects Chinese warships near Okinawa

Japan’s Ministry of Defense reported that four Chinese Navy vessels transited from the East China Sea into the Pacific Ocean between January 27 and 28, passing through waters near Okinawa and the Miyako Strait, in a movement monitored by Japanese air and naval forces.

According to a statement released on January 28 by Japanese Defense Minister Shinjiro Koizumi, the first vessel—a Jiangkai II-class frigate—passed between Okinawa Island and Miyako Island on the night of January 27. By early morning, three additional ships followed: a Luyang II-class guided-missile destroyer, a Luyang III-class guided-missile destroyer, and a Fuchi-class replenishment ship, bringing the total number of Chinese vessels to four.

In response, the Japan Maritime Self-Defense Force deployed assets to track and monitor the group’s movements. The mine countermeasures vessel Shishijima, assigned to the 46th Mine Countermeasures Squadron in Okinawa, conducted surface surveillance, while maritime patrol aircraft from multiple units carried out airborne monitoring. These included a P-1 aircraft from the 1st Air Patrol Group based in Kanoya and a P-3C aircraft from the 5th Air Patrol Group operating out of Naha.

The Ministry of Defense stated that Japanese forces conducted continuous surveillance and intelligence collection throughout the transit, maintaining awareness of the Chinese task group as it moved through the strategically sensitive strait connecting the East China Sea with the western Pacific.

The transit follows a pattern of increased Chinese naval activity beyond what is known as the First Island Chain, a line of islands stretching from Japan through Taiwan and the Philippines that has long been considered a key geographic boundary in regional security planning. Japanese officials say Chinese naval forces have been conducting these operations with growing frequency, signaling sustained efforts to expand regular access to the open Pacific.

Defense Minister Koizumi noted that China continues to intensify its military activity around Japan, including repeated surface and air operations near Japanese territory. He emphasized that Japan’s Self-Defense Forces remain on a 24-hour monitoring posture to ensure early warning and rapid response.

The Chinese vessels involved represent a mix of surface combatants and logistics support, indicating a formation capable of sustained operations at distance from home ports. The inclusion of a Fuchi-class replenishment ship suggests the group was configured for extended deployment rather than a short transit, a detail Japanese defense officials routinely examine when assessing Chinese naval patterns.

The Miyako Strait is one of the most frequently used passages for Chinese Navy operations moving from the East China Sea into the Pacific. Unlike other straits in the region, it lies in international waters, allowing naval forces to transit legally without prior notification. For Japan, however, these movements remain a critical indicator of China’s expanding blue-water capabilities and its ability to operate beyond coastal defense roles.

Japan has increasingly relied on its P-1 maritime patrol aircraft for long-duration surveillance of surface and submarine activity, while maintaining older P-3C aircraft in service for complementary missions. The combination of air and surface tracking allows the Self-Defense Forces to maintain continuous contact with foreign naval groups transiting near Japanese territory.