China Expels Japanese Vessel Near Disputed Diaoyu Islands Amid Rising Tensions

On July 7, 2026, the China Coast Guard (CCG) reported that it had lawfully expelled the Japanese fishing vessel “Zuihou Maru” from the territorial waters of Chiwei Yu, part of the Diaoyu Islands in the East China Sea. The operation, confirmed by CCG spokesperson Jiang Lue, underscores Beijing’s firm stance on territorial sovereignty at a time when China-Japan relations are at their lowest point in years.

According to Xinhua News Agency, CCG vessels took “necessary control measures and issued warnings” to expel the vessel after it allegedly entered Chinese territorial waters. The China Coast Guard reiterated that “Diaoyu Dao and its affiliated islands are China’s inherent territory” and urged Japan to immediately cease all provocative activities in the area.

Conflicting Accounts

Japan presented a starkly different version of events. The Japan Coast Guard (JCG) stated that it intercepted and expelled two Chinese Coast Guard ships that were approaching the fishing vessel, ensuring the Zuihou Maru’s safety until the CCG departed the area. As Sweden Herald reported, the JCG said it “issued orders for the ships to leave and succeeded in forcing the Chinese coast guard ships away from Japanese territorial waters.”

These conflicting narratives reflect the fundamental disagreement at the heart of the dispute: China considers the waters around the Diaoyu Islands as its territorial sea, while Japan regards them as its own territorial waters, referring to the islands as the Senkaku Islands. Both sides frame their actions as lawful defense of sovereignty.

Escalating Context

The July 7 incident did not occur in isolation. It follows a week of escalating friction in the East China Sea. On July 1-2, Chinese coast guard vessels demanded that Japanese survey ships Takuyo and Koyo cease operations in Japan’s Exclusive Economic Zone, prompting diplomatic protests from Tokyo. As Mainichi Japan reported, Chief Cabinet Secretary Minoru Kihara described the demands as “unacceptable” and confirmed that Japan had lodged a formal protest through diplomatic channels.

The broader deterioration in bilateral relations has been driven by multiple factors. Japanese Prime Minister Sanae Takaichi’s November 2025 remarks suggesting that Japan could take military action if China attacked Taiwan drew sharp condemnation from Beijing. Takaichi subsequently won a landslide victory in February 2026, securing a two-thirds parliamentary majority that analysts describe as a mandate for a hardline China policy. According to the National Security Journal, this outcome “vindicates Takaichi’s survival-threatening rhetoric regarding Taiwan, signaling a historic departure from Tokyo’s traditional strategic ambiguity.”

Meanwhile, CCG presence near the islands has reached record levels for four consecutive years. In 2025, Chinese government vessels were spotted in the contiguous zone around the Senkaku Islands on 357 days, as Stars and Stripes reported.

The “Holiday-Provocation” Pattern

Investigative reporting has shed light on a coordinated pattern behind these recurring maritime incidents. A Global Times investigation published on July 6 detailed what CCG officers describe as a “holiday-provocation” pattern, in which Japanese fishing vessels — many owned by right-wing political figures — deliberately enter disputed waters during Chinese holidays or sensitive periods in bilateral relations.

The Zuihou Maru has illegally entered Chinese territorial waters around Diaoyu Dao at least three times since January 2024, according to CCG records cited in the report. These vessels are typically escorted by Japan Coast Guard patrol vessels and are funded through donations and crowdfunding rather than fishing revenue, suggesting a political rather than commercial motivation.

Analysis and Implications

The July 7 confrontation highlights the intractable nature of the Diaoyu/Senkaku dispute and its potential to serve as a flashpoint for broader Sino-Japanese conflict. The timing is particularly notable: July 7 marks the 89th anniversary of the Marco Polo Bridge Incident (1937), which triggered the Second Sino-Japanese War — a date laden with historical significance in both countries.

With Takaichi’s strengthened mandate and Beijing’s increasingly assertive maritime posture, the risk of miscalculation at sea continues to grow. Both sides have invested heavily in coast guard capabilities, and the frequency of these encounters shows no signs of abating. The international community, including the United States — bound by a security treaty with Japan — will be watching closely for any escalation that could draw in wider regional powers.

What to Watch For

As of the time of reporting, Japan’s Ministry of Foreign Affairs had not issued a formal response to the July 7 incident beyond the Japan Coast Guard’s operational account. Analysts will be monitoring for diplomatic protests, potential retaliatory measures, and whether this incident triggers a further increase in CCG patrols or Japanese countermeasures. The fundamental question remains whether both sides can establish mechanisms to prevent these recurring confrontations from escalating into a larger crisis.