Typhoon approach calendar for Kanto Koshin
Period: finalized records for 1951–2025 (75 years)
The Japan Meteorological Agency (JMA) normal (1991–2020) is 3.3 per year. In the 1951–2025 records, the date with the most approaches is September 16 (9 times in 75 years), so the peak comes later than in most other regions.
Figures in the text are based on records collected as of September 2026 (1951–2025 totals).
An "approach" is counted on each date when the center of a typhoon came within 300 km of any staffed weather station in Kanto Koshin, following the JMA definition. Preliminary values for the current year are not included.
These are statistics compiled from observations for 1951–2025 (75 years), not a weather forecast for any particular day. For the latest forecasts, see the JMA website.
Approaches by date (times in the past 75 years)
By date, approaches were most frequent on September 16: 9 times in 1951–2025 (75 years).
Uncolored cells mean 0 approaches on that date in the past 75 years. The table below has the values for each month.
Total approach days by month
| Month | 1951–2025 | 1996–2025 |
|---|---|---|
| January | 0 days | 0 days |
| February | 0 days | 0 days |
| March | 0 days | 0 days |
| April | 0 days | 0 days |
| May | 4 days | 1 day |
| June | 18 days | 8 days |
| July | 44 days | 24 days |
| August | 124 days | 44 days |
| September | 101 days | 40 days |
| October | 60 days | 31 days |
| November | 2 days | 0 days |
| December | 0 days | 0 days |
Total approach days are the sum of approach dates over all years. A typhoon that approached on 2 days counts as 2 days. Bar lengths are relative to the month with the most days in each column. The 2 columns cover different numbers of years, so compare lengths only within the same column (they still show in which month the peak falls). The JMA normal (1991–2020) for annual approaches to Kanto Koshin is 3.3.
Smoothed share of years with an approach (1996–2025)
The share of years with an approach on each date, smoothed over 4 days on each side (most recent 30 years). For the raw records by date, the counts in the calendar above are authoritative.
Other regions and search
Okinawa / Amami / Southern Kyushu / Northern Kyushu / Shikoku / Chugoku / Kinki / Tokai / Hokuriku / Izu and Ogasawara Islands / Tohoku / Hokkaido