Japan maritime hardening and ISR/SCS cooperation
Key Questions
What incidents occurred between CCG and Japanese vessels near the Senkaku/Diaoyu Islands?
On July 1 the CCG expelled a Japanese survey vessel near Diaoyu, and on July 6 a fishing vessel confrontation occurred. Both sides issued conflicting expulsion claims.
How extensive is China's coast guard presence around Diaoyu?
Global Times reported CCG presence on 357 days in 2025, indicating near-total coverage. Japanese vessels have begun using Starlink for real-time monitoring.
What legal actions has China taken against Japan-Philippines maritime talks?
Beijing escalated legal warfare with historical claims over the Batan Islands and formal rebuttals by Chinese think tanks to block bilateral boundary declarations.
What research ship activities took place in disputed EEZs?
A Chinese research ship entered Japan's EEZ near Kume Island while Japanese survey ships were harassed near Diaoyu, resulting in reciprocal incursions.
How is Japan responding to declining monitoring capacity?
Japan is accelerating remilitarization and developing attack-capable unmanned submarines to offset JMSDF surveillance shortfalls.
What new CCG patrol tactic is China using east of Taiwan?
China launched coast guard patrols using replacement task forces and a 'ship change' rotation to maintain continuous presence.
Which countries have pushed back against Chinese maritime activity?
The US, UK, France, and Germany have issued statements, while Japan has been notably absent from coordinated pushback.
How does the July 6 Senkaku incident fit broader patterns?
Analysts describe it as part of three waves of escalation met by CCG countermeasures and ongoing gray-zone 'salami slicing' tactics.
CCG harassed Japanese survey ship near Okinawa multiple times; on July 1, CCG expelled a Japanese survey vessel near Diaoyu. Analysis suggests submarine reconnaissance. JMSDF monitoring capacity declining. China launched coast guard patrol east of Taiwan as replacement task force with 'ship change' tactic; US, UK, France, Germany pushback but Japan absent. Beijing escalated legal warfare against Japan-Philippines maritime boundary talks, with detailed historical claims over Batan Islands. China think tank formally rebutted Japan-Philippines bilateral maritime boundary declaration. Chinese research ship entered Japan's EEZ near Kume Island while Japanese survey ship was harassed near Diaoyu — reciprocal EEZ incursions. Japan accelerating remilitarization. New analysis frames three waves of escalation met by CCG countermeasures, with CCG presence on 357 days in 2025. The July 1 Diaoyu incident is seen as part of a 'salami slicing' tactic. Global Times depth piece on Japan-Philippines collusion. New: 7 Chinese warships simultaneously transited 4 sensitive straits, adding to maritime pressure. China's dual-line pressure on Japan-Philippines maritime boundary talks detailed in new analysis. CCG near-total coverage of Diaoyu confirmed: 357 days in 2025, Japanese vessels using Starlink for real-time monitoring. Japan developing attack-capable unmanned submarines. New: On July 6, a Chinese fishing vessel confrontation near Senkaku resulted in both sides claiming expulsion, adding to the pattern of gray-zone incidents.