On Aug. 18, 2026, off the Goto Islands in Nagasaki Prefecture, Japanese fighter pilots were sent up to shadow an unusual pair drifting across the East China Sea. One was a Chinese Y-9 electronic-warfare aircraft. The other had no one aboard at all: a Tengden TB-001 “Twin-Tailed Scorpion,” a large armed reconnaissance drone, tracing long north-south lines toward Okinawa.

Japan’s Ministry of Defense photographed both aircraft and named them openly. It was, the ministry said, the first time this fiscal year that a TB-001 had been confirmed flying over the East China Sea, another quiet escalation in a corner of the map where Chinese and Russian aircraft now appear almost weekly.

What Japan saw

According to the Japanese Joint Staff, the two aircraft came up over the East China Sea from off the Danjo Islands, south of Nagasaki, and ran toward the waters off the main island of Okinawa. The drone flew looping north-south patterns; the Y-9 eventually turned back west toward China. In response, the Air Self-Defense Force launched fighters from its Western Air Defense Force to identify and follow them.

The Twin-Tailed Scorpion

The Tengden TB-001 is one of China’s most menacing drones, and one of its stranger-looking. It has a twin tail-boom layout and three turboprop engines, two pulling from the wings and a third pushing from the tail. Publicly reported figures give it a payload of more than a tonne and an endurance of up to roughly 40 hours, letting it loiter over the sea for a day and a half at a stretch.

First shown at the Zhuhai Air Show in 2022, the TB-001 is a reconnaissance-strike machine: it carries a large electro-optical sensor turret and can be armed with anti-ship and surface-to-surface missiles. That combination, a drone that can watch, wait and then hit, is exactly what makes its appearance off Japan more than a curiosity.

A pattern, not a one-off

The drone did not fly alone. Its companion, a Y-9 in a signals-intelligence and electronic-warfare fit, is a familiar visitor: Japan has intercepted the type repeatedly in recent months, alongside Russian Il-20 spy planes and joint China-Russia patrols. Japan has not confirmed that the TB-001 and the Y-9 were operating as a manned-unmanned team, but their overlapping flight paths were notable, and hint at where Chinese airpower is heading.

For the crews of the JASDF, the message is simpler and more grinding. The scrambles keep coming, the aircraft keep getting more capable, and the once-rare sight of an armed Chinese drone over the East China Sea is quietly becoming routine.

Sources: Japan Ministry of Defense (Joint Staff), The Aviationist.