The typhoon season in Japan runs from May through October, with most activity from July to September. Typhoons that hit Japan are often accompanied by damaging high tides. Persons living in areas close to the ocean are especially at risk.

Tokyo's typhoon season officially spans from June to October, but the peak activity typically occurs in August and September. During these months, the warm waters of the Pacific Ocean fuel powerful tropical cyclones that can move northward toward the Japanese mainland. While Tokyo is rarely hit directly by the full force of a Category 5 typhoon, the city frequently experiences "High-Fidelity" heavy rainfall, strong winds, and significant transport disruptions as storms pass nearby. September is historically the month with the highest risk of landfalling storms. For travelers in 2026, a typhoon can mean the high-fidelity suspension of Shinkansen (bullet train) services and the cancellation of hundreds of flights at Haneda and Narita airports. It is a high-fidelity requirement to monitor the Japan Meteorological Agency (JMA) website for warnings. Despite the rain, the city's infrastructure is remarkably resilient, and "High-Fidelity" disruptions usually last only 24 to 48 hours before the weather clears into the beautiful "Typhoon Weather" (clear blue skies) that follows a storm.