TokyoTyphoon Dujuan has dropped over 300 mm of rain since Saturday.
The Japan Meteorological Agency warned conditions could deteriorate rapidly as it passes near Tokyo.
Linear rain bands can dump extraordinary rainfall on a narrow area for hours, raising flash-flood risk across Kanto.
Downpours could intensify from Monday afternoon, and Asian Games organisers postponed equestrian eventing in Aichi until Tuesday.
How each outlet framed it
- Daily Maverick
- highlights linear rain bands as emerging Japanese extreme-rainfall concern; situates within 2026 global weather-extremes pattern
Sources: Daily Maverick