Typhoon Chanhom, the 15th typhoon of the season, made landfall in the southern part of Ibaraki Prefecture, Japan, at around 8 p.m. on the 11th. This is the first time a typhoon has made landfall in Ibaraki Prefecture since relevant statistics began being compiled in Japan in 1951. 'Chanhom' is a name submitted by Laos and refers to a type of tree.

The typhoon is moving along an unusual path, expected to traverse Japan's main island of Honshu from east to west and exit into the Sea of Japan on the 12th. The Japan Meteorological Agency forecast that heavy rain accompanied by thunder and lightning would fall across a wide area stretching from Tohoku to western Japan. The Kanto and Koshin'etsu regions are expected to receive up to 180 mm of rainfall, while the Tohoku region is expected to see around 150 mm, through the evening of the 12th.

Warnings and Concerns Over Damage

The Japan Meteorological Agency urged special caution, warning that torrential rain could lead to a variety of damage including landslides, flooding in low-lying areas, river overflows, lightning strikes, and gusty winds. It also noted that because Chanhom is following an unusual trajectory, there are concerns about damage from strong winds and high waves in the Kanto region of eastern Honshu, including Tokyo, as well as along the Tohoku coast.

Mounting Transportation Disruptions

The typhoon is causing disruptions to air travel and rail services. As of 8 p.m. on the same day, 67 flights to and from Haneda and Narita airports had been canceled. The Tokaido and Tohoku Shinkansen lines operated normally until 6 p.m., but the possibility of delays or suspensions remains thereafter. On the JR East Joban Line between Iwaki Station and Mito Station, as well as on the limited express Hitachi train connecting Tokyo's Shinagawa Station and Sendai Station, train services were suspended on parts of the routes starting in the afternoon.

Wind Speeds and Damage Status

As of 10 p.m., Typhoon Chanhom's central pressure was recorded at 997 hectopascals (hPa), with maximum sustained winds of 20 meters per second. Strong winds exceeding 15 meters per second were blowing within 500 km northeast and 330 km southwest of the typhoon's center.

In Kitaibaraki City, Ibaraki Prefecture, a gust of 29.3 meters per second — the maximum instantaneous wind speed — was observed during a three-hour period starting at 4:30 p.m. on the same day. In Tokyo's Omotesando area, roadside trees were toppled by strong winds, leading to restrictions on nearby pedestrian and vehicle traffic.