I checked the data for typhoons until October 31, 2020.
Looking at the data for October alone, the number of typhoons formed has been trending down since 1951.
?Data Source: Japan Meteorological Agency (JMA)
The number of typhoons formed from January through October between 1951 and 2020 also shows a downward trend.
In addition, as November 2, 2020, the number of typhoons landing in Japan this year is still zero.
