Typhoon Chan-hom crossed Japan from east to west in a reverse direction before moving into the Sea of Japan this week [1].
The storm's atypical trajectory challenges existing meteorological patterns and underscores the need for updated disaster-response measures in East Asia. Because the system moved in a reverse direction, it caught regional forecasting services by surprise.
The typhoon made landfall in Ibaraki Prefecture, marking the first time such a storm has hit that specific area since 1951 [1]. This unprecedented track shifted the storm's path toward the Sea of Japan, where it continued to pose a threat to nearby maritime regions and coastal territories.
Following its passage through Japan, the system moved toward the Korean Peninsula. Meteorological reports indicate that the storm brought up to 80 mm of rain to South Korea’s east coast, as well as the islands of Ulleungdo and Dokdo [1].
Local officials and meteorologists said that the rarity of the path highlights gaps in current forecasting models. The movement of Typhoon Chan-hom serves as a case study for how shifting climate patterns may create unpredictable storm tracks, potentially increasing the risk for regions that historically consider themselves safe from direct landfalls.
“The storm crossed Japan from east to west in a reverse direction”
The rare eastward-to-westward movement of Typhoon Chan-hom suggests that traditional storm corridors in the Pacific are becoming less predictable. By striking Ibaraki Prefecture for the first time in 75 years, the event demonstrates that historical data may no longer be a reliable guide for disaster preparedness in Japan and South Korea.
