Record rainfall kills four, strands thousands in Japan during Bon holiday

The rain came down in sheets across Chiba prefecture, east of Tokyo, and by Friday morning the damage was already measured in lives lost and thousands of people trapped far from home. In the span of twenty-four hours, some areas recorded more than 360 millimeters of water—enough to turn roads into rivers and rail lines into impassable barriers. Four people were confirmed dead. A man in his sixties or seventies was found floating on a flooded street. A 66-year-old woman died trapped inside her submerged car. Two others were discovered collapsed or unaccounted for. Two more were feared dead or missing. The Chiba Prefecture Disaster Management Office released these details with the flat precision of official reports, but the numbers carried weight: this was the worst rainfall the region had seen in recent memory, arriving during Bon, the week when millions of Japanese travel to visit family and return home.

The timing could not have been worse. Bon is one of Japan's busiest travel periods, a cultural moment when the country moves. Narita airport, which serves the Tokyo region, became a holding pen. Thousands of people spent the night there, waiting for trains that had stopped running and for flights that, at least, continued to operate normally. At Soga train station, 4,000 people found themselves stranded for hours as floodwaters rose around them. The Japan Ground Self-Defence Force arrived to evacuate them. Hundreds more took shelter overnight in the Chiba prefectural government building. More than 230,000 people were advised to evacuate their homes. Eighty homes actually flooded.

The infrastructure collapsed under the weight of water. More than 22,000 households lost power by 11 a.m. on Friday. Roads and rail lines were submerged. Photographs and television footage showed the aftermath in daylight—homes and cars and sections of railway track buried in muddy water, the landscape transformed into something unrecognizable. Chiba Governor Toshihito Kumagai stood before reporters Friday morning and said something that carried the weight of genuine shock: he had responded to many disasters in his career, but he had never experienced anything like this.

By Friday morning, the rain had begun to subside, and the Japan Meteorological Agency downgraded its most severe warning for heavy rain across more than a dozen municipalities in the prefecture. But the agency was not declaring the crisis over. More rain was forecast for later in the day. Train services began to resume, though delays rippled through the system. Flights at Narita returned to normal operations, and people began the slow process of getting home, or trying to.

Soldiers had been dispatched to help with relief efforts. The scale of the displacement—thousands stranded, hundreds of thousands advised to shelter—meant that the response would take time. The immediate crisis of the rainfall itself was passing, but the work of recovery was just beginning. The prefecture was counting its dead and accounting for the missing, measuring the damage in flooded homes and darkened neighborhoods, and trying to restore the systems that had failed under an extraordinary weight of water.