On July 19, 2026, the Sino-Russian joint naval patrol flotilla taking part in the "Joint Sea-2026" exercise conducted live-fire training roughly 180 kilometers southwest of Okinotori Reef. The Chinese Navy's Type 052D destroyer Kaifeng fired live rounds that struck an orange target on the sea. For the first time, Japan's Ministry of Defense confirmed — and publicly disclosed — that a Chinese naval vessel had conducted a firing drill in the vicinity of Okinotori Reef, and lodged representations through diplomatic channels. Shen Yi's commentary cut straight to the point: "Not even a protest."
A Legal Duel over One Reef
Okinotori Reef is a reef. Not an island — a reef. In the original Chinese, that distinction takes just seven characters, and it is the key to understanding the whole affair.
Okinotori Reef lies in the western Pacific, about 1,700 kilometers from Tokyo. At high tide, less than 10 square meters of it remain above water. Under Article 121 of the United Nations Convention on the Law of the Sea (UNCLOS), a rock is entitled to neither an exclusive economic zone nor a continental shelf — an explicit rule of international law.
Japan stopped treating it as a reef back in 1987. The government in Tokyo has spent tens of billions of yen building concrete breakwaters around the palm-sized outcrop and wrapping it in titanium-alloy netting — an attempt to physically renovate its legal identity. In 2008, Japan filed a submission with the United Nations Commission on the Limits of the Continental Shelf claiming, with Okinotori Reef as the base point, an exclusive economic zone of roughly 740,000 square kilometers — nearly twice the area of the Japanese home islands.
China has voiced its opposition repeatedly since 2004: a reef is a reef, and spending money on breakwaters does not turn it into an island. This is not nitpicking — if such a precedent held, any Pacific state could pick out a rock, pour concrete around it, and fence off hundreds of thousands of square kilometers of ocean.
The legal dispute ran for nearly twenty years, but it stayed at the level of diplomatic statements and academic debate.
Live Rounds That Changed the Rules
The live-fire drill of July 19 moved this debate from the written word to the water.
According to a bulletin issued by Japan's Ministry of Defense, on July 19 the Japan Maritime Self-Defense Force detected the Sino-Russian flotilla on joint patrol about 330 kilometers southwest of Okinotori Reef — comprising the Chinese Type 055 destroyer Anshan, the Type 052D destroyer Kaifeng, the Type 903A comprehensive supply ship Kekexilihu, and the Russian Navy corvette Rezkiy. The flotilla then moved to a position about 180 kilometers southwest of the reef — inside the "exclusive economic zone" that Japan has unilaterally drawn.
There, the Kaifeng conducted live-fire training, its orange target clearly visible on the water.
One hundred eighty kilometers is a precise distance. Under UNCLOS, the territorial sea extends 12 nautical miles (about 22 kilometers) from the baselines, and the exclusive economic zone 200 nautical miles (about 370 kilometers). The firing point falls squarely inside that band — waters Japan claims as its exclusive economic zone, a claim China does not recognize. Firing live rounds in a body of water defined by "you claim it, I don't agree" struck something more than an orange target: it struck Japan's twenty-year legal fiction.
Shen Yi — a professor at Fudan University and one of China's most widely read commentators on international affairs — offered a reading that was precise and terse: the live-fire drill was there to "tell Japan plainly that its so-called exclusive economic zone does not exist."
Why Now
The timing was no accident.
July 12, 2026 marked the tenth anniversary of the South China Sea arbitration award. Around that date, the contest between China and Japan over the law of the sea had already gone through a dense round of offense and defense.
On July 12, China's Ministry of Foreign Affairs issued a five-part statement systematically setting out its position; fourteen countries released a joint statement in support of the arbitral award; and Minister Shi Yong of the Chinese Embassy in Japan lodged solemn representations — while a foreign ministry spokesperson reached for the phrase "an eye for an eye." On July 13, the current-affairs outlet Guanchazhe Wang (guancha.cn) published a detailed reconstruction of how Japan, by backing the South China Sea arbitration award in 2016, had maneuvered itself into a bind of its own making on the Okinotori issue — a boomerang thrown ten years earlier had finally come home.
The Sino-Russian joint live-fire drill one week later was the physical landing point of that boomerang. It was not an isolated incident but one link in a chain of legal contestation — from the foreign ministry's jurisprudential statement, to the embassy's representations in Tokyo, to pressure applied through a two-channel "pincer structure," and finally to this station: a Sino-Russian naval flotilla drawing a circle, with live shells, inside waters over which Japan claims jurisdiction.
The subtext of the operation was clear: since Japan had once invoked the United Nations Convention on the Law of the Sea to support the South China Sea arbitration, Article 121 of that same convention — the rule that a rock may generate no exclusive economic zone — applies to Japan with equal force. Law runs in both directions.
"Not Even a Protest"
Later that day, Shen Yi added a telling detail to his commentary: "Not even a protest."
Japan's Ministry of Defense confirmed the live firing and announced that it had lodged representations through diplomatic channels. But the wording Tokyo actually used — according to Kyodo News — was merely that the drill "may endanger the navigational safety of nearby vessels." No protest over the sovereignty of Okinotori Reef, no protest over the violation of an exclusive economic zone; instead, Japan sidled around to the angle of "navigational safety."
That in itself is a kind of admission. When you stop arguing "this is my territory and you have no right to fire here" and switch to saying "please mind the safety of your firing," you have already tacitly accepted the other side's right to fire. Japan's cautious wording confirms Shen Yi's judgment in reverse — Tokyo itself knows that the legal case for treating Okinotori Reef as an island rather than a rock cannot stand.
"Not even a protest."
This was not a routine military training exercise but a precisely engineered legal-military operation. The shells landed at the 180-kilometer mark — exactly inside Japan's claimed "exclusive economic zone," yet short of any territorial sea: every kilometer of that distance was calculated. Shen Yi's analysis lays bare the double logic of the move: militarily, it is a plain message "that Japan's so-called exclusive economic zone does not exist"; jurisprudentially, it is the boomerang effect a decade after the South China Sea arbitration — Japan invoked the United Nations Convention on the Law of the Sea to bind China in 2016, and today the same convention binds Japan itself.