Typhoon Downgraded After Historic East-to-West Path Across Japan, but Rain Risks Remain Amid Obon Holiday

At 9:00 AM on August 12, Typhoon No. 15 (Chan-hom) downgraded to a tropical depression over the Sea of Japan. The storm followed an unprecedented trajectory, moving from east to west and making landfall in Ibaraki Prefecture for the first time in recorded history before crossing the main island of Honshu. Following the announcement, the phrase "downgraded to a tropical depression" trended on social media, sparking a mix of relief and confusion over the erratic weather.

However, meteorologists and disaster prevention agencies strongly warn that a tropical depression does not mean the danger has passed. Humid air flowing into the region continues to destabilize the atmosphere across vast areas from Tohoku to western Japan. Despite occasional breaks in the clouds, sudden torrential downpours persist, and authorities are urging continued vigilance against low-lying flooding, rising rivers, and landslides.

The storm comes during the peak of the Obon holiday travel season, leaving many commuters and vacationers uncertain about their plans. Social media users expressed frustration over when to safely travel or go outdoors. Compounding the situation, Typhoon No. 17 has newly formed near the Ogasawara Islands and could approach Japan over the weekend. Anyone traveling or returning home during the holiday is advised to monitor the latest weather updates closely.

The Context

Obon is a major Japanese holiday season held in mid-August when people traditionally return to their hometowns to honor ancestral spirits, resulting in peak domestic travel on highways, trains, and flights. Typhoons in the Northwestern Pacific usually travel from southwest to northeast across Japan due to prevailing westerly winds; an east-to-west trajectory is extremely rare. Additionally, in Japan's tropical climate, a downgraded tropical depression can still dump massive amounts of localized rain, making continued safety precautions vital even after a storm loses its official typhoon status.

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