China is working to widen the split between Okinawa and Tokyo, a slow-moving risk for Japan, the US military presence in the region, and Taiwan's security.

• China is pushing the idea that Okinawa's status is unsettled, pointing to the old Ryukyu Kingdom that paid tribute to China before Japan took it over in the 1870s.
• The goal is not to win Okinawans over to China but to deepen local anger at Tokyo and at US bases, making it harder for Japan to back Taiwan.
• Okinawa is a natural pressure point: it holds 0.6% of Japan's land but 70% of US bases in the country, plus crime, pollution, and economic grievances.
• Okinawa sits less than 750 km from Taiwan with close to 30,000 US troops, so its bases would be central in any fight over the island.
• The campaign is not changing minds yet — polls show Okinawans see China as a threat at about the same rate as the rest of Japan.

Outlook: Expect more Chinese messaging aimed at Okinawan resentment, with the real test being whether Tokyo can keep the island onside if a Taiwan crisis comes.