Illustrative depiction of naval activity in the Taiwan Strait, featuring a Japanese Maritime Self‑Defense Force destroyer.

Taiwan Strait Transit and Beijing’s Reaction

This piece examines the Taiwan Strait transit and Beijing’s response to a routine maritime passage.

On my China Eastern flight from Barcelona to Shanghai, the China Daily tabloid in the seat pocket carried a headline that stood out: “PLA warns Japan after Strait transit.”

It was the 21 April 2026 edition, published just weeks before Donald Trump visited Beijing in mid‑May. The article described a fourteen‑hour passage through the Taiwan Strait by a Japanese Maritime Self‑Defense Force destroyer. The Strait runs roughly 370 kilometres north to south. A transit that slow is not routine navigation, and PLA analysts quoted in the paper framed it as intentional.

The timing made it sharper. The Japanese ship passed through the Strait on 17 April 2026, the anniversary of the Treaty of Shimonoseki, signed exactly 131 years earlier. That treaty ended the First Sino‑Japanese War. China ceded Taiwan and Penghu, which Japan ruled until 1945.

The reparations were severe: 200 million taels of silver, equal to three years of Japan’s government budget and worth an estimated USD 1.3 trillion today. The money funded the Imperial Navy that later defeated Russia and attacked Pearl Harbor. The treaty also ended five centuries of Chinese suzerainty over Korea, which Japan later annexed in 1910. Thus, Tokyo gained the same commercial privileges that European powers had forced on China.

The treaty marked a strategic reversal. China had been the central power in Asia; after 1895, Japan was. Chinese textbooks call this the beginning of the Century of Humiliation, a narrative that still shapes Beijing’s view of Taiwan and anchors the One China Policy.

A Japanese warship moving slowly through the Strait on that anniversary was not treated as a coincidence.

Strait Geography

The Taiwan Strait rarely dominates global headlines, but its geography makes it one of the most constrained waterways in the Indo‑Pacific. At its narrowest, it is about 160 kilometres wide and only 70 metres deep. Shallow waters limit submarine manoeuvrability. Narrow channels make amphibious operations predictable. The entire area becomes a missile‑dominated battlespace rather than one suited to carrier groups or large surface fleets. Geography does not decide outcomes, but it narrows the choices available to every actor.

This is why Beijing keeps the Taiwan question tightly within the One China framework. China insists Taiwan is part of China, prefers peaceful reunification, but refuses to renounce force if Taiwan moves toward independence or if foreign powers intervene.

Trump’s Visit to Beijing

During Trump’s visit to Beijing, Xi Jinping repeated these positions. He argued that the Taiwan Strait is not international waters, warned that US military deployments inside the Strait would cross China’s red lines, and stated again that reunification is inevitable.

Trump acknowledged China’s sensitivities but reaffirmed that the United States would continue to uphold the Taiwan Relations Act, maintain the capacity to resist coercion, support stability in the Strait, and conduct lawful naval operations under international norms. His message aimed to avoid escalation without accepting limits on US presence.

Taiwan Relations Act of 1979 is a United States law that outlines how the U.S. maintains unofficial ties with Taiwan after recognizing the People’s Republic of China as the sole legal government of China in 1979. However, without recognising Beijing’s claim over the island)

Seen together, the slow Japanese transit, the anniversary of Shimonoseki, the PLA’s reaction, and the statements made in Beijing form a single chain. History, symbolism, and strategy intersect in the Taiwan Strait. The past is not background noise. It is an active part of the present.

If the Strait were ever closed, the regional shock would be immediate. Japan and South Korea would face fuel shortages within days, as more than 90 percent of their oil passes through the Strait or adjacent routes. Taiwan’s economy would stall, cutting off the world’s supply of advanced chips. Southeast Asian shipping lanes would clog as vessels reroute through the Philippines and Indonesia. The US‑Japan alliance would be forced into rapid coordination, and China would face sanctions severe enough to trigger a regional recession. A closure would not be a local crisis. It would be an Indo‑Pacific‑wide rupture.

The Taiwan Strait transit itself was routine, conducted in accordance with established maritime norms. However, China’s messaging around the Taiwan Strait transit reflects long-standing political sensitivities.

Taiwan Relations Act
Trump’s Method to Madness

References:

GovInfo (U.S. Government Publishing Office)

Zhao, L. (2026, April 21). PLA warns Japan after Strait transit. China Daily, p.5.