Overview

• Japan’s Meteorological Agency urges strict vigilance in Hokkaido through August 27 for landslides, low‑lying floods and river rises, with caution also advised in Tohoku.
• Linear rainbands could form from late night August 26 to morning August 27, especially over Kamikawa–Rumoi and Ishikari–Sorachi–Shiribeshi, rapidly increasing the danger of severe flooding.
• Toyotomi Town logged 131.0 mm in six hours by 2:50 p.m. on August 26, a site record that exceeded its typical August monthly total.
• Forecasts call for up to 150 mm of rain in 24 hours through the evening of August 26, followed by as much as 100 mm in Hokkaido and 120 mm in Tohoku in the next 24 hours.
• The low is expected to strengthen while tracking into the Sea of Okhotsk with a southward‑moving cold front, keeping conditions highly unstable and risking totals in Soya that may surpass a normal August month.